Parameter	Min	Typ	Max
Operating Current		600 mA	800 mA
Center Wavelength	1290 nm	1320 nm	1340 nm
ASE Power @ IOP	10 mW	20 mW
Peak Gain @ IOP		30 dB
Optical Bandwidth	30 nm	50 nm
Gain Ripple (rms) @ IOP Res. BW = 0.1 nm		0.35 dB	1 dB
Angled Facet Reflectivity		0.005%	0.01%
Normal Facet Reflectivity		10%
Forward Voltage		1.3 V	1.8 V
Chip Length		2.0 mm
Waveguide Refractive Index		3.2
Lateral Beam Exit Angle		26.5°
Transverse Beam Divergence (FWHM)	20°	30°	40°
Lateral Beam Divergence (FWHM)	10°	20°	30°

Features

Broad Tuning Range
High Output Power
Ultra-Low Angled Facet Reflectance: 0.005% (Typ)
Gain Medium for Narrow Linewidth Fiber Bragg Grating Lasers
Gain Medium for Widely Tunable External Cavity Semiconductor Lasers

Single Angled Facet (SAF) gain chips use a geometric technique to further reduce the reflection on one end of the chip by curving the ridge waveguide so that it is not normally incident to the chip facet. This, in combination with an AR coating on that facet, virtually eliminates back reflections that can create unwanted feedback into the laser cavity. As a result, SAF gain chips are superior to standard gain chips when used in Extended Cavity Lasers (ECLs), particularly tunable ECLs, since any residual reflection from the AR-coated Fabry-Perot (FP) gain chip facet often limits the stability, output power, and spectral quality of the laser.

Other SAF Gain Chips
1320 or 1550 nm Chip in Half Butterfly
1220 nm Chip on Submount or Heatsink
1450 nm Chip on Submount or Heatsink
1550 or 1590 nm Chip on Submount or Heatsink
1650 nm Chip on Submount or Heatsink

Sample Results of an SAF1144 Used in a Basic Littman-Metcalf Configuration

SAF1144 Performance in a Littman Metcalf Cavity

For more information on using a SAF gain chip in an external cavity laser see the online External Cavity Diode Laser Tutorial.

P/I Graph for gain chip

ASE Spectrum of Gain Chip

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Posted Comments:

Poster: avle

Posted Date: 2013-04-03 03:37:32.637

Could you send a custom quote for SAF1144H with a 90% reflectivity coating instead of 10?

Poster: jlow

Posted Date: 2013-04-03 13:27:00.0

Response from Jeremy at Thorlabs: We will get in contact with you on the quote.

Poster: bdada

Posted Date: 2011-10-06 19:52:00.0

Response from Buki at Thorlabs: The standard SAF1144H with 10% AR coating has a cavity length of 2mm. For a 90% AR equivalent of SAF1144H, we would recommend a 1mm cavity length. We can provide a custom version with a 90% AR coating and we will contact you directly to discuss the details.

Poster: votava

Posted Date: 2011-10-06 05:50:25.0

Hello, this is rather a question than a comment. I would like to ask if the SAF1144H gain chip is also available with the 90% normal facet reflectivity (as is offered with the 1450nm gain chip). I would like to use both chips in identical external cavity laser designs for compatibility. Thank you in advance for your information, with best regards, Ondrej Votava, Ph.D.

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SAF Gain Chips, 1320 nm Center Wavelength

Features

Sample Results of an SAF1144 Used in a Basic Littman-Metcalf Configuration