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
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 |
Webpage Features | |
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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 | ||||
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1220 nm | 1320 nm | 1450 nm | 1550 / 1590 nm | 1650 nm |
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.
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 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.
Basic Littrow Configuration
Fiber-Coupled SAF Gain Chip Drawing
Posted Comments: | |
Jin Ahn
 (posted 2020-11-01 08:40:15.42) Hello, I am currently using TLK_L1550R in order to tune SAF1550S2 gain chip. However, I am currently having issue with setting 1st order diffraction maximum grating.
From the manual on page 11(step12), it mentions that 1st order diffraction maximum can be set up by rotating the
grating and locating its strongest diffraction with the
included IR viewing card.
But what does this visually mean on IR card? YLohia
 (posted 2020-11-10 04:12:41.0) Hello, thank you for contacting Thorlabs. The strongest diffraction would be the beam that produces the brightest spot on the IR card. JIN Ahn
 (posted 2020-06-10 00:51:53.45) Hi, I'm currently using ITC110 in order to control the TEC and laser current for SAF1550S2 gain chip.
However, I'm having some issue with the thermistor on the gain chip. From multi-meter, I get open line reading on gain chip thermistor. What could be the problem here? YLohia
 (posted 2020-06-10 03:48:02.0) Hello, thank you for contacting Thorlabs. We are sorry to hear about the issues you are experiencing. This sort of issue usually occurs due to incorrectly wiring the thermistor connections to the temperature controller or a short somewhere in your temperature sensor. I have reached out to you directly to discuss this further. nick Yang
 (posted 2020-05-26 22:03:26.033) Hi, I'm requesting inquiry in terms of operating SAF1550S2. We have noticed that the gain chip's TEC is operated with thermistor. We wanna know the thermistor specs in order to convert resistance value in terms of Celsius. Is there a way that we can get in touch with the thermistor spec sheets? YLohia
 (posted 2020-05-27 09:27:30.0) Hello, thank you for contacting Thorlabs. These SAFs contain a 10 kOhm thermistor with the following Steinhart Coefficients:
A: 1.129241E-03;
B: 2.341077E-04;
C: 8.775468E-08;
The theoretical Beta value is 3870 at 25 C. 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? |
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 icon below for more detailed performance specifications.