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Tunable Laser Gain Chips with Thermoelectric Coolers
CWL = 1320 nm,
CWL = 1550 nm,
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.
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.
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
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.
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.