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532 nm Diode-Pumped Solid State (DPSS) Lasers

  • 532 nm DPSS Lasers
  • 10 mW or 40 mW Power Output
  • Ø9.5 mm Package with M9 x 0.5 Threading
  • Hermetically Sealed Package




DPSS Laser
Mounting Flange

Application Idea

Our Laser Diode Driver Kits Include an
LD Controller, TEC Controller,
LD/TEC Mount, and Accessories


532 nm, 10 mW

Related Items

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Class 3B


  • 532 nm Output
  • 10 mW or 40 mW Output Power (CW)
  • 12 mrad Beam Divergence
  • M9 x 0.5 Threaded Housing
  • Same Pin Spacing as Standard Ø5.6 mm Laser Diodes
  • Compatible with the LDM56 Temperature-Controlled Mount

Thorlabs' compact 532 nm Diode-Pumped Solid State (DPSS) green laser modules are a combination of Nd:YVO4 and KTP crystals pumped by an 808 nm laser diode. The front window consists of a wedged glass filter, which blocks the IR source light and hermetically seals the module. DPSS lasers can be used like any typical semiconductor laser diode, but offer a much smaller beam divergence. The polarization of the DJ532-10 laser is perpendicular to the line made by pins 1 and 3 (see pin diagrams below) while the DJ532-40 laser has a polarization that is parallel to this same line. DPSS lasers are intended for CW operation and should not be pulsed.

These lasers are compatible with our LDM56 temperature-controlled laser diode mount using the LDM56DJ mounting flange (sold below). The Ø2.0 mm pin spacing on the rear is identical to our Ø5.6 mm laser diodes. Efficiency is reduced outside of the operating temperature range (20 to 25 °C) as a result of the temperature sensitivity of the laser crystals. In the absence of a regulated heat sink, the pump laser current is enough to heat the laser far above 25 °C.

These lasers can be used with any of our M9-threaded aspheric lens adapters if the temperature of the DPSS laser is controlled. Compatibility with our wide range of SM1-threaded (1.035"-40) components is possible using our S1TM09 adapter. The unthreaded portion of the housing can also be secured inside our AD9.5F Collimator Adapter. When mounting these lasers, it should be noted that there is an X-Y position offset between the pins and the emitted beam. These lasers are manufactured such that the emitted beam is concentric with respect to the housing. If mounting by the pins instead of the M9-threaded front face, the emitted beam will be slightly off-centered from the mount. Please contact Tech Support for more details.

For best results, please follow all typical laser diode handling procedures. Please note that the DJ532-10 (10 mW) monitor current only represents the power of the IR pump laser and not the output of the green DPSS laser. For this reason, we recommend using the DJ532-10 with a constant current laser diode driver. The DJ532-40 does not contain a monitor photodiode.

Laser Safety and Classification

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina. 

Laser Glasses Laser Curtains Blackout Materials
Enclosure Systems Laser Viewing Cards Alignment Tools
Shutter and Controllers Laser Safety Signs

Safe Practices and Light Safety Accessories

  • Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
  • Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
  • Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
  • Laser Safety Curtains and Laser Safety Fabric shield other parts of the lab from high energy lasers.
  • Blackout Materials can prevent direct or reflected light from leaving the experimental setup area.
  • Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards.
  • A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW.
  • All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use.
  • Do not place laser beams at eye level.
  • Carry out experiments on an optical table such that all laser beams travel horizontally.
  • Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.
  • Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.
  • Operate a laser at the minimum power necessary for any operation.
  • If possible, reduce the output power of a laser during alignment procedures.
  • Use beam shutters and filters to reduce the beam power.
  • Post appropriate warning signs or labels near laser setups or rooms.
  • Use a laser sign with a lightbox if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
  • Do not use Laser Viewing Cards in place of a proper Beam Trap.


Laser Classification

Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:

Class Description Warning Label
1 This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser.  Class 1
1M Class 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly.  Class 1M
2 Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm).  Class 2
2M Because of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams.  Class 2M
3R Lasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class.  Class 3R
3B Class 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock.  Class 3B
4 This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock.  Class 4
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign  Warning Symbol

Posted Comments:
Antonin Delas  (posted 2019-12-06 03:25:47.837)
Good morning, For my application, I need a more powerful green DPSS. Is it possible to only buy the 9.5mm package, and use a custom 808nm diode? Would it work with high powers? Thanks a lot
katrin.philipp  (posted 2019-02-27 13:42:56.677)
Hi, I am also interested in the spectrum of DJ532-40 diode lasers and the coherence length. Could you please send me the same information you sent to jxxu (posted 2019-02-21 09:51:02.0). Thank you!
llamb  (posted 2019-02-28 09:51:38.0)
Thank you for your feedback. I have reached out to you directly.
jxxu  (posted 2019-02-20 23:05:38.177)
Hi, Do you have the spectrum of DJ532-40 diode lasers? I want to know the FWHM of the longitudinal mode and the coherence length of the laser. Thanks!
YLohia  (posted 2019-02-21 09:51:02.0)
Hello, thank you for contacting Thorlabs. Measuring the DJ532-10 (200mA, 25C) with our SA200 Scanning Fabry Perot Interferometer we calculated a linewidth of ~10.9MHz which translates to a coherence length of ~27.5m. Following a similar procedure with the DJ532-40 (330mA, 24C) we calculated ~30MHz linewidth for a coherence length of ~10m.
jact  (posted 2018-12-04 10:11:49.25)
Can you give any details of the residual IR (specifically 1064, but also 808) emitted from the device? We would actually want to use the 1064 as a seed in a DFM stage, so are hoping there could still be a small but usable level transmitted.
YLohia  (posted 2018-12-04 11:14:16.0)
Hello, thank you for contacting Thorlabs. The IR leakage at 808nm and 1064nm is on the order of ~1.0 uW each, depending on the variant of the DJ532 model, though this is not something we specify. I will reach out to you directly with more information on how the test was conducted.
user  (posted 2018-10-04 10:30:20.797)
Is the laser diode controller TLD001 compatible with the DPSS laser DJ532-40? Thanks.
YLohia  (posted 2018-10-04 10:48:42.0)
Hello, we do not recommend the TLD001 for the DJ532-40 since the driver maxes out at an output current of 200mA. This diode, however, has a typical operating current of 330mA (400mA max). Thus, we recommend the LDC205C instead.
deepak.korhalkar  (posted 2018-04-07 06:03:03.883)
Please specify Model No. of the Aspheric Lens ( with mount ) that must be used to collimate the DJ532-10. I guess the output power will be variable if we vary the drive current. Kindly confirm & send the graph if you have. Thanks
YLohia  (posted 2018-04-09 03:11:12.0)
Response from Yashasvi at Thorlabs USA: Hello, thank you for contacting Thorlabs. The beam size is around Ø50µm at the output face of the crystal in the DPSS. The divergence is typically around 12 mrad (could be as high as 15 mrad) from that point on. We have seen very low divergences (less than 5 mrad) as well. Given that the divergences can be very low, placing a short focal length lens can result in the beam being focused to a spot. Keeping this in mind, for general use, we do not recommend the use of collimation optics. If necessary, you could look into using long focal length aspheric lenses. We have a tutorial for picking an appropriate lens for single mode laser diode collimation here: The typical Optical Power vs Drive Current plot can be found on the spec sheet available on the website. Please note that we do not recommend this diode for pulsed operation.
Sasha  (posted 2018-03-19 22:04:12.687)
What is M^2 and ellipticity of the dpss laser 10 mw?
YLohia  (posted 2018-03-26 09:26:55.0)
Hello, thank you for contacting Thorlabs. Unfortunately, we do not test individual units for their M^2 and ellipticity, so we don't really have a spec for this. That being said, in subjective terms, the beam is quite circular. I will reach out to you directly with the data we do have regarding this.
stuart.mirell  (posted 2016-02-16 18:56:25.0)
What is the typical polarization extinction ratio of the 532 nm DJ532-10 DPSS laser?
besembeson  (posted 2016-03-09 01:37:41.0)
Response from Bweh at Thorlabs USA: Though the pump and second harmonic generation process that generates the output are highly polarized in nature, the measured linear PER is only in the 5-10dB possibly due to some ellipticity that is introduced prior to the output.
kwbchang2009  (posted 2015-10-06 23:51:16.29)
do you have the noise data on the output for this diode please call me at 408 799 3595 or email data to me
besembeson  (posted 2015-10-13 11:43:28.0)
Response from Bweh at Thorlabs USA. We don't have a typical noise data (amplitude or frequency) at this time. When using this, remember that it is a diode pumped laser with a frequency doubling crystal and the nonlinear effect is sensitive to temperature so besides using a very stable current source, the operating temperature should also be optimized within the specified range for single mode operation.
hallt  (posted 2015-04-07 16:27:19.143)
I would be really excited if you had a DPSS module such as this WITHOUT the KTP crystal. Any chance of getting one of those?
jlow  (posted 2015-04-15 04:45:02.0)
Response from Jeremy at Thorlabs: This is not a module we have. I will contact you directly regarding the possibility of getting this.
user  (posted 2014-08-18 15:25:36.167)
Hi Jeremy: "The polarization direction of DJ532-40 is parallel to the line made by pins 1 and 3. " Are you sure? I checked with mine and found that it's ~40 degrees from the pin1-3 direction (horizontal of TCLDM9). Am I doing something wrong?
jlow  (posted 2014-08-21 03:18:35.0)
Response from Jeremy at Thorlabs: Since you did not leave your contact info, please contact us at and we will troubleshoot this issue. Thanks.
rsuper  (posted 2014-04-02 18:44:45.803)
What is the polarization axis with respect to the packaging pin layout?
jlow  (posted 2014-04-03 09:10:50.0)
Response from Jeremy at Thorlabs: The polarization direction of DJ532-40 is parallel to the line made by pins 1 and 3. For the DJ532-10, it is perpendicular to the line made by pins 1 and 3.
busko  (posted 2013-04-03 17:59:51.263)
After using DJ532-40 round half a year it getting hard to obtain TEM00 mode. Some time ago it helped to change the temperature, or to play with a current, but now I have no more ideas.. Laser is mounted in TCLDM9. Could you give an advice? Or should we buy a new one?
jlow  (posted 2013-04-11 09:37:00.0)
Response from Jeremy at Thorlabs: The typical lifetime for the DJ532-40 is around 5000 hours or so. We will get in contact with you directly to discuss about your DJ532-40.
barney.william  (posted 2013-02-12 11:36:50.31)
I am interested in modulating this laser at about 400 Hz. I saw the comment posted below about crystal state lifetimes being a limitation, but there was no further information. Also, can this laser be fiber-coupled?
jlow  (posted 2013-02-14 15:36:00.0)
Response from Jeremy at Thorlabs: For the DJ532 series, we do not recommend modulating this (only use as a CW source). The reason for this is because one cannot get clean output signal if modulated. For example, within a 5ms pulse, the output is quite noisy and erratic. Also, the output is non-linear (because of the non-linear crystal in the DPSS). You could possibly fiber couple this with the right optics and mount.
tcohen  (posted 2013-01-10 10:52:00.0)
Response from Tim at Thorlabs: This is correct. The LDM9T and LDM21 use a flange for the mount’s taps with a center distance of 20.32mm as opposed to the TCLDM9’s 19.05mm. We chose to introduce a flange for this mount as testing on the TCLDM9 with the DJ532 series showed it was able to dissipate the heat generated by the DPSS.
bbattle  (posted 2013-01-04 10:14:43.61)
The TCLDM9DJ mounting flange for LD DJ532-10 does not fit the LDM9T mount: the distance between mounting screws needs to be 20mm, but are 19mm.
jlow  (posted 2012-11-01 11:12:00.0)
Response from Jeremy at Thorlabs: The linewidth for the DJ532-40 should be around 30MHz.
oriol.alvarez  (posted 2012-10-31 09:00:29.72)
Hello, I could not find the spectral characteristics of this product. In particular I am interested in the linwidth (which should be < 30 pm). Can I have more information on this please? Thank you in advance
jlow  (posted 2012-09-04 14:26:00.0)
Response from Jeremy at Thorlabs: The photocurrent from the monitor photodiode only represents the power of the 808nm pump laser diode and is not indicative of the optical power output of the 532nm laser. Typically, the DJ532 is used with a constant current source. For example, for an OEM solution, you could use the LD1255R (
olivier.hignette  (posted 2012-09-03 15:05:31.0)
I do not see any information about the photodiode current of a DJ-532-10 which would allow me to set up the gain with a EK1102 evaluation kit
sharrell  (posted 2012-06-07 14:16:00.0)
Response from Sean at Thorlabs to busco: Thank you for your feedback. You are indeed correct, the vaule for P0 in the Operating Current and Operating voltage entries on the spec sheet and web spec table for the DJ532-40 should be 40 mW. We are correcting this error and the spec sheet and website should be updated soon.
busko  (posted 2012-06-06 07:10:58.0)
There is a small mistake in a spec sheet for DJ532-40: "Operating Current @ P0 = 10 mW*. " Should be 40 mW.
tcohen  (posted 2012-05-11 16:04:00.0)
Update from Tim at Thorlabs: The beam waist is about 50um located at the surface of the crystal. After testing two DJ532-10 units, the output is elliptically polarized and both units have PER (the power ratio between the max power axis and min power axis) between 13dB to 14dB. Measuring the DJ532-10 (200mA, 25C) with our SA200 Scanning Fabry Perot Interferometer we calculated a linewidth of ~10.9MHz which translates to a coherence length of ~27.5m. Following a similar procedure with the DJ532-40 (330mA, 24C) we calculated ~30MHz linewidth for a coherence length of ~10m. Thank you for your interest in these DPSS laser diodes. We are continuing to characterize these and will update the web presentation with more information.
tcohen  (posted 2012-05-09 12:11:00.0)
Response from Tim at Thorlabs: Thank you all for your feedback. We are working to update the web presentation in the near future to provide more information. For your immediate needs I will compile this data and update you shortly.
ihp  (posted 2012-05-08 05:43:36.0)
What is the coherence length of the DJ532-10? Ib
holmlid  (posted 2012-05-07 10:40:43.0)
What is the polarization state of the laser beam from this DJ532 laser?
tcohen  (posted 2012-04-19 12:05:00.0)
Response from Tim at Thorlabs: Thank you for your feedback! There are a few things that may alter the performance of the DPSS when modulating the pump diode. Because the DJ532 has a laser diode which pumps a crystal, the lifetime of the energy states of the crystal will likely limit modulation speed. Also, the response is highly non-linear which will cause uneven pulses. I will contact you to continue this discussion.
busko  (posted 2012-04-18 12:53:31.0)
Could this laser be modulated by the current modulation (for example with pulse-peaker and TCLDM9 mount) or it is mostly designed for CW usage?
gao53  (posted 2012-03-31 09:51:20.0)
May I know the output beam diameter of this LD? Thanks.
gao53  (posted 2012-03-30 11:01:05.0)
What is the coherence length of this laser diode?
bdada  (posted 2012-03-15 15:03:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. The beam diameter is about 60um (FWHM) at the crystal surface which is about 1.35mm inside the device’s front window. We are currently revising the specification sheet for this laser in order to provide more information. Please contact if you have additional questions.
user  (posted 2012-03-12 11:30:03.0)
What are the beam diameters (FWHM) for your DPSS laser modules? As the divergence is so small that becomes quite important.
bdada  (posted 2011-12-29 11:53:00.0)
Response from Buki at Thorlabs: I would like to correct my former response. While the pin out of the DPSS laser is compatible with our temperature controlled mounts, we do not currently have a mounting flange designed to hold the DPSS laser in our temperature controlled mounts. We are working on making the mounting flange available soon. As a temporary solution, we can provide a custom mounting flange. Please contact if you have any questions.
bdada  (posted 2011-12-27 15:40:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. The DPSS lasers are compatible with our TCLDM9 temperature controlled mount. Please contact if you have additional questions.
user  (posted 2011-12-24 11:39:19.0)
Is the DPSS laser compatible with your TCLDM9 or other LD mount in "Related Products" linked above?
bdada  (posted 2011-11-03 16:59:00.0)
Response from Buki at Thorlabs: We have visible collimated laser modules that may be better suited to your alignment needs. Please use the link below to get more information: The DJ532-10 is a bare diode that will require a laser driver as well as a lens to get a collimated beam. We have contacted you to discuss your application and assist you in selecting the appropriate products.
iain  (posted 2011-11-03 11:11:27.0)
Would this laser (DJ532-10) be suitable as an alignment laser for a telescope? (It would need to be visible at a distance of about 50 m, and attenuated for safety.) Does it require a specific power supply? Can it be operated from a battery?

532 nm DPSS Lasers

Item # DJ532-10 DJ532-40
Min Typical Max Min Typical Max
Wavelength 531 nm 532 nm 533 nm 531 nm 532 nm 533 nm
Optical Output Power - 10 mW 20 mW - 40 mW 50 mW
Operating Current @ Poa - 220 mA 250 mA - 330 mA 400 mA
Operating Voltage @ Poa - 1.9 V 2.2 V - 1.9 V 2.2 V
Slope Efficencya 0.1 W/A 0.2 W/A - 0.1 W/A 0.2 W/A -
Beam Divergence, Full Angle - 12 mrad 15 mrad - 12 mrad 15 mrad
Pin Code A E
LD Reverse Voltage (Max) 2 V 2 V
Operating Temperature 20 to 25 °C 20 to 25 °C
Storage Temperature -30 to 70 °C -30 to 70 °C
Pin Diagramb Pin Code A Pin Code E
  • Temperature = 25 °C
  • The monitor photodiode of the DJ532-10 measures the power of the pump source, not the 532 nm output. Therefore, we recommend using these lasers with constant current diode controllers.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
DJ532-10 Support Documentation
DJ532-10532 nm, 10 mW, A Pin Code, DPSS Laser
DJ532-40 Support Documentation
DJ532-40532 nm, 40 mW, E Pin Code, DPSS Laser

Mounting Flange for DPSS Lasers

The LDM56DJ mounting flange is used to secure a 532 nm DPSS laser to the LDM56(/M) temperature-controlled laser diode mount. To use, mount either the DJ532-10 or the DJ532-40 laser in the LDM56(/M) mount. Using the two 2-56 x 3/8" cap head screws provided with the flange, or with the mount itself, attach the flange to the mount.

Please note: this flange is sold separately from the LDM56(/M) Temperature Controlled Laser Diode Mount.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
LDM56DJ Support Documentation
LDM56DJDPSS Laser Mounting Flange for LDM56(/M) Laser Diode Mount
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