Tunable Laser Kit Components
The SAF gain chips can also be coupled to PM fiber. Please contact Tech Support for more information on customization and quotes.
Note: The TFP780A does not include a fiber-coupled output.
Thorlabs offers half-butterfly gain chip mounting plates that properly angle the gain chip relative to the rest of the laser cavity. Mounting plates may be interchanged on both Littman and Littrow cavity configurations to pair with a gain chip to generate the desired output wavelength. Please see the table to the right for the correct top plate based on the cavity configuration.
The gain chip mounting plates feature a 6-pin half butterfly mount and preconnected pin recepticles. Mounting plate connections are made to the tunable laser kit via gold-plated, spring-loaded connectors on the bottom of the plate. Note that mounting plates for TO-packaged diodes are listed below.
These mounting plates integrate TO-packaged laser diodes into Thorlabs' Tunable Laser Kits. They are drop-in replacements for the standard Half-Butterfly Mounting Plates. As TO-packaged diodes are readily available with various center wavelengths, this represents an economical solution for building a customized tunable laser that operates at wavelengths for which a half-butterfly gain chip is not available.
The mounting plates incorporate a 10 kΩ thermistor into the diode bracket for accurate temperature readings, and a 1.5 A TEC element is placed in contact with this bracket via thermal grease, providing excellent heat transfer. If greater thermal control is required, the TEC element may be replaced with a larger TEC by the user.
These mounting plates ship ready to accommodate either a Ø5.6 mm or a Ø9 mm diode. Regardless of which model is ordered, a supplementary bracket is included to accept the other diode package size. When changing between brackets, ensure that the thermistor is disconnected from the wiring harness and re-apply thermal grease to the TEC element before re-attaching a laser diode bracket.
Includes Controller Interface with Laser Polarity Switches
The TLK-BM allows users to customize their Tunable Laser Kit so that it best suits their application. This base module is the common mounting plate on which all other tunable laser components are mounted. The table below lists many possible cavity configurations based on the gain chip used. A component or set of components from each column should be acquired to construct a tunable laser. While standard Tunable Laser Kits use a half-butterfly gain chip, AR-coated diodes and laser diodes may also be used. For help choosing the appropriate components for your tunable laser or for custom parts (i.e., other gratings), please contact Tech Support.
The base module includes a controller interface with polarity switches to support different AR-coated and laser diodes.
Thorlabs offers five holographic reflection gratings featuring 900, 1050, 1350, or 1800 grooves/mm for use with TLK Series Littrow Tunable Laser Kits. The gratings are premounted on a pivot arm for easy installation into existing Tunable Laser Kits.
Thorlabs offers five holographic reflection gratings featuring 600, 750, 900, 1150, or 1500 grooves/mm for use at 1900, 1550, 1310, 1050, or 770 nm, respectively. The gratings, 17.0 mm x 7.3 mm, are premounted for easy installation into existing Tunable Laser Kits. When convertng from Littrow to Littman configurations, a TLK-LGP grating platform is also required.
The TLK-LGP Grating Platform is designed to securely hold a Littman grating module within the tunable laser kit assembly. The image to the right shows the TLK-G0900M grating mounted in the platform. To rotate the grating, simply loosen the M3 cap screw with the included hex key, and rotate the grating using the knurled knob below the platform. The platform is secured to the laser kit with two M4 cap screws and washers, which are also included.
Premounted Mirror for Easy Installation
Front Silvered Mirror
The Littman Mirror Module for Thorlabs' Tunable Laser Kit features a premounted, front silvered mirror for easy installation. The mirror, 25.0 mm x 18.0 mm, is mounted to a radial arm controlled by the Tunable Laser Kit.
Radial Arm Retainer Spring
TLK-MM1: 1/4"-80 Internal Thread Designed for Z812 Actuator
TLK-MM2: Designed for Ø9.5 mm (Ø3/8") Barrel Actuators
Thorlabs offers two tuning actuator mounts. The first is the TLK-MM1, which has a 1/4"-80 threaded bushing. It is the standard tuning actuator mount included with tunable laser kits and is ideal for mounting the Z812 DC servo motor (below). The second tuning actuator mount is the TLK-MM2. This mount has a clamp for Ø9.5 mm (Ø3/8") barrel actuators. This allows the integration of actuators such as our PE4 manual and piezo drive or the Mitutoyo 148-142 high-resolution micrometer.
12 mm Travel
29 nm Theoretical Resolution
3 mm/s Max Velocity
The Z812 is the standard DC servo motor used in Thorlabs' Tunable Laser Kits. Its 1/4"-80 threaded barrel mounts to the TLK-MM1 Tuning Motor Mount. We recommend using the TDC001 controller for this actuator.
Use in Tandem with Main Tuning Actuator
9.1 µm Max Displacement
150 V Max, 100 V Recommended Drive Voltage
0.75 µF ± 20% Capacitance @ 1 kHz, 1 VRMS
This piezo module attaches to the grating pivot arm (Littrow) or mirror pivot arm (Littman) via its M12 x 1.25 threaded housing to provide fine wavelength tuning of a Tunable Laser Kit. The standard tuning actuator is a Z812 DC servo motor, which offers 12 mm of travel and a minimum incremental movement of 0.05 µm. The piezo module is used in tandem with the Z812 tuning actuator, allowing the user to access the full tuning range, while also having the ability to finely tune the wavelength. The TLK-PZT1 has a BNC connector for use with Thorlabs open-loop piezo controllers. The table below lists the incremental wavelength tuning of the tunable laser kits when the TLK-PZT1 is integrated into them.
Fine Push Adjustment
Securely Fasten with Cap Screws
Thorlabs' Mode Hop Adjuster is designed to adjust the pivot point of the radial arm in a tunable laser to eliminate fluctuations in the laser's intensity/power at a given mode. The adjuster is designed to push the pivot bracket which the radial arm is mounted to. Once the desired position is reached, the pivot bracket can be secured to the kit base plate.
Please Note: The Mode Hop Adjuster is not designed to pull the radial arm stage. The pivot bracket must be manually reset to the starting position, followed by fine push adjustment by the adjuster.
Thorlabs' offers two different Mounted Aspheric Lenses for use in the Tunable Laser Kit. The premounted lenses offer easy integration and alignment. The TLK-352330-B Collimating Lens incorporates a Ø5.00 mm, f = 3.1 mm, NA = 0.68 Geltech Aspheric Lens with AR coating for 600 - 1050 nm (Part # 352330-B). The TLK-352330-C Collimating Lens incorporates a Ø5.00 mm, f = 3.1 mm, NA = 0.68 Geltech Aspheric Lens with AR coating for 1050 - 1620 nm (Part # 352330-C).
Provides 0.3 mm Travel
100 TPI Adjuster
Steel Lead Screw with Steel Ball Contacting a Sapphire Disk
Thorlabs' Flexure Focus Adjuster provides a precise and stable linear adjustment of the aspheric lens in the Tunable Laser Kit. Fine adjustment is achieved using the 100 TPI adjustment screw. A steel lead screw with steel bearing contacting a sapphire disk along with the flexure mechanism provides enhanced stability. The Mounted Aspheric Collimating Lens is secured to the Focus Adjuster using two M3 x 0.5 cap screws. The Focus Adjuster is secured to the Gain Chip Mounting Plate using two M3 cap screws.
The TLK-E enclosure is essential for the most sensitive applications. Designed to act as a sealed container, it allows the user to purge the system with gas to remove absorption lines. Thorlabs' Pure Air Circulator Unit, which generates an extremely dry, nearly particle-free environment, can be attached to the TLK-E enclosure with the use of hose adapters. To provide temperature stability beyond that of the thermoelectric cooler included with the gain chip, a heater kit (TLK-H) can be added. This heater attaches between the base plate of a Tunable Laser Kit and the bottom plate of the enclosure. By connecting a TC200 temperature controller, the temperature of the whole enclosure can be precisely stabilized.
When using a free-space tunable laser kit, it is often desirable to have your emitted beam aligned to your optical table (i.e., beam path follows the hole matrix). The TLK-SM-1 steering mirrors redirect the beam of a free-space Littman configuration beam so that it is aligned to the hole matrix. Please note that these mirrors attach to the base of the enclosure, and thus the enclosure is required.