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Tunable Laser Gain Chips with Thermoelectric Coolers


  • Wavelength Ranges Centered at 1050, 1220, 1320, 1450, 1550, or 1900 nm
  • Broadband Tunability
  • Thermoelectrically Cooled Half-Butterfly Assembly

SAF1174S

CWL = 1320 nm,
SM Fiber

SAF1550P2

CWL = 1550 nm,
PM Fiber

Related Items


Please Wait
Item # ASE Center
Wavelength
ASE 3 dB
Bandwidth
Peak
Gain
Gain
Ripple
SAF1175S 1220 nm 80 nm 17 dB 0.5 dB
SAF1174S 1320 nm 80 nm 35 dB 0.35 dB
SAF1450S2 1450 nm 100 nm 20 dB 0.4 dB (Max)
SAF1550S2 1550 nm 80 nm 17 dB 0.6 dB (Max)
SAF1550P2 1550 nm 80 nm 17 dB 0.6 dB (Max)
SAF1900S 1900 nm 150 nm 18 dB 1.5 dB

All values are typical, unless otherwise indicated. Please refer to the Specs tab for more information. The Graphs tab describes the typical performance obtained in an external cavity laser configuration.

Webpage Features
info icon Clicking this info icon below will open a window that contains item specifications and graphs.

Features

  • Gain Chips Mounted for Easy Integration into External Cavity Lasers
  • Half-Butterfly Assembly with Thermoelectric Cooler
  • AR Coating Eliminates Unwanted Reflections, Increasing Laser Stability, Output Power, and Spectral Quality
  • 1.0 m Long (Min), SM or PM Tight Jacket Pigtail with FC/APC Connector

Thorlabs' family of Single-Angled-Facet (SAF) Gain Chips provides a gain medium for light in wavelength ranges centered at 1220, 1320, 1450, 1550, or 1900 nm. These gain chips feature AR coatings, an angled waveguide, and a proven SOA structure, which gives designers of external cavity lasers (ECLs) the highest power and widest tuning range available on the market. The gain chip is mounted in a half-butterfly package that collimates the output of the normal facet and couples it into an FC/APC connectorized fiber. A thermoelectric cooler (TEC) and thermistor, incorporated into the package and controlled with the easily accessible supplied pins (see the Graphs tab), enable tuning and optimization of the operating temperature.

On certain models, we can optionally provide a PM fiber or an optical isolator for the free-space input. Please contact Tech Support for a quote.

Other SAF Gain Chips: Chip on Submount or Heatsink
1220 nm 1320 nm 1450 nm 1550 / 1590 nm 1650 nm
Spec Sheet This link opens a document that contains a comprehensive list of performance specifications and performance plots.

All quoted values are typical, unless otherwise indicated. Please see the gain chip's Spec Sheet (linked below) for the most detailed information on performance. The Graphs tab describes the typical performace obtained in an external cavity laser configuration.

General Specifications
Item # Spec
Sheet
Reference Cavity CWLa Tuning
Rangea, b
Peak
Powera
Chip Gainc Gain Ripple R1 R2 Chip Length
SAF1174S Spec Sheet TLK-L1300Rd 1310 nm 100 nm 50 mW 35 dB 0.35 dB 0.005% 10%e 2 mm
SAF1550S2 Spec Sheet TLK-L1550Rd 1550 nm 120 nm 40 mW 17 dB 0.6 dB (Max) 0.005% 10%e 1 mm
SAF1550P2 Spec Sheet TLK-L1550Rd 1550 nm 120 nm 40 mW 17 dB 0.6 dB (Max) 0.005% 10%e 1 mm
  • The values given in the highlighted columns were measured in the specified reference cavity. Different external cavities will produce different performance specifications.
  • 10 dB point.
  • Single-pass optical gain at center of gain curve.
  • This item is no longer available for individual purchase.
  • Refer to the SAF chip reflectivity diagram below.

ASE Specifications
Item # Center Wavelength (Typ.) 3 dB Bandwidth (Typ.) ASE Current Operating Current (Typ.) Operating Current (Max)
SAF1174S 1320 nm 80 nm 600 mA (Typ.) 500 mA 800 mA
SAF1550S2 1550 nm 80 nm 300 mA (Typ.) 300 mA 600 mA
SAF1550P2 1550 nm 80 nm 300 mA (Typ.) 300 mA 600 mA

Note: The light polarization is horizontal inside the SAF Gain Chips.

SAF Reflectivity Drawing

*R2 = 10% for all models in the SAF series except the SAF1900S, for which R2 = 20%.

SAF Gain Chip Lasing Performance Using Littrow Tunable Laser Kit*

The innovative design of an SAF gain chip is ideal for use in external cavity lasers because it virtually eliminates unwanted feedback from the intracavity facet of the gain chip. These devices offer superior performance in a wide variety of external cavity configurations. Given below are typical spectra and details on the packaged devices.

*Our Littrow Tunable Laser Kit has been discontinued.

Item # Center Wavelength Power vs. Current Power Spectrum
SAF1175S 1220 nm SAF1175S Power Versus Current SAF1175S Power Spectrum
SAF1174Sa 1320 nm SAF1174S Power Versus Current SAF1174S Power Spectrum
SAF1450S2 1450 nm SAF1550S2 Power vs. Current SAF1550S2 Power Spectrum
SAF1550S2 1550 nm SAF1550S2 Power vs. Current SAF1550S2 Power Spectrum
SAF1550P2 1550 nm SAF1550P2 Power vs. Current SAF1550P2 Power Spectrum
SAF1900S 1900 nm SAF1900S Power Versus Current SAF1900S Power Spectrum
  • Please note that the fluctuations in the power spectrum between 1350 and 1380 nm are associated with water vapor absorption.

Basic Littrow Configuration

Basic Littrow Configuration

Fiber-Coupled SAF Gain Chip Drawing

SAF Gain Chip


Posted Comments:
guillaume.paradis  (posted 2018-08-01 12:12:19.907)
Would it be possible to have the angled facet output be pigtailed?
YLohia  (posted 2018-08-08 09:00:07.0)
Hello, thank you for contacting Thorlabs. I will reach out to you directly about our custom capabilities.
gksthf666  (posted 2017-04-24 11:50:33.363)
To whom it may concern, Greetings, I'm Hansol Jang and I'd like to get some customized SAF1550S2. Can I get a SAF1550S2 without an integrated isolator? An integrated isolator makes some problems in my research. Also, can I select reflectances of both facet? Best, Hansol Jang
tfrisch  (posted 2017-05-02 10:18:26.0)
Hello, thank you for contacting Thorlabs. I will reach out to you directly about our custom capabilities.
tcohen  (posted 2013-01-14 13:10:00.0)
Response from Tim at Thorlabs: Thank you for contacting us! We are currently working on developing a 780nm SAF gain chip, fiber-coupled in a half-butterfly package. It would be feasible to incorporate an optical isolator at this wavelength in the half-butterfly package. We will contact you directly to keep you updated.
jikim  (posted 2013-01-08 17:44:46.747)
could you manufacture a TFP780A with a fiber output together with an optical isolator? The optical isolator has small priority, but the fiber output is required. And could you produce a TFP780A with an angled facet at R1? I look forward to hearing from you soon.
Adam  (posted 2010-04-09 15:39:09.0)
A response from Adam at Thorlabs: The fiber used in the SAF1176S is SMF-28. We will correct the drawing on the website so it references the correct part number.
user  (posted 2010-04-09 14:56:57.0)
The SAF1176S autocad drawing is reffering to a SAF1175 device(1220 nm) with a 1060 fiber. What fiber is used in the SAF1176S?

SAF Gain Chips

Limited Stock Icon

The SAF1175S, SAF1450S2, and SAF1900S will be retired without replacement when stock is depleted. If you require this part for line production, please contact our OEM Team.

  • Designed for Use in a Littrow Cavity
  • 1.0 m Long (Min), SM or PM Tight Jacket Pigtail with FC/APC Connector

Thorlabs' SAF Gain Chips are designed for use in wavelength ranges centered at 1220, 1320, 1450, 1550, or 1900 nm. The models designed for 1220, 1320, 1450, or 1550 nm (SAF1175S, SAF1174S, SAF1450S2, SAF1550S2, and SAF1550P2) feature an optical isolator on the fiber output, protecting the chip against back reflections and increasing laser stability.

Each SAF Gain Chip is individually burned in and rigorously tested to ensure long-term stability and compliance with our specifications. For typical performance characteristics, please see the Specs tab. A complete test report will come with each serialized gain chip package.

Click the info icon icon below for more detailed performance specifications.

ASE Specifications
Item # Info Center Wavelength (Typ.) 3 dB Bandwidth (Typ.) ASE Current Operating Current (Typ./Max)
SAF1175S info 1220 nm 80 nm 200 mA (Typ.) 200 mA/ -
SAF1174S info 1320 nm 80 nm 600 mA (Typ.) 500 mA/800 mA
SAF1450S2 info 1450 nm 100 nm 500 mA (Max) -/500 mA
SAF1550S2 info 1550 nm 80 nm 300 mA (Typ.) 300 mA/600 mA
SAF1550P2 info 1550 nm 80 nm 300 mA (Typ.) 300 mA/600 mA
SAF1900S info 1930 nm 150 nm 400 mA (Typ.) 500 mA/800 mA
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SAF1175S Support Documentation
SAF1175SMounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1220 nm, SM Fiber
$2,783.04
Today
SAF1174S Support Documentation
SAF1174SMounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1320 nm, SM Fiber
$2,783.04
Today
SAF1450S2 Support Documentation
SAF1450S2Mounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1450 nm, SM Fiber
$2,783.04
5-8 Days
SAF1550S2 Support Documentation
SAF1550S2Mounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1550 nm, SM Fiber
$2,783.04
Today
SAF1550P2 Support Documentation
SAF1550P2Mounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1550 nm, PM Fiber
$2,943.78
Today
SAF1900S Support Documentation
SAF1900SMounted SAF Gain Chip, Half Butterfly Pkg, CWL = 1900 nm, SM Fiber
$2,783.04
5-8 Days
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