GK Semi

Laser Products

1950-FBG-ECDL

Single-Frequency Butterfly Laser

Narrow linewidth · High polarisation purity · Standard butterfly package | Enabling precision gas sensing and coherent LiDAR.

1950-FBG-ECDL product photograph
Wavelength1950 ± 0.1 nm
Output10 mW
Operating modeCW
Spectral width<0.1 nm
Pulse / dutyContinuous wave

01 / Product introduction

Product introduction

This 1950 nm single-frequency butterfly laser pairs a high-quality antimonide (GaSb) gain chip with a polarisation-maintaining fiber Bragg grating (PM-FBG) external-cavity structure, producing stable single-longitudinal-mode output of high spectral purity. Precision TEC temperature control and a thermistor are built in, and the industry-standard 14-pin butterfly package keeps the device compact and tolerant of its operating environment.

02 / Core application scenarios

Core application scenarios

01
Environmental and gas sensingTDLAS absorption spectroscopy of trace gases such as CO₂ and H₂O, and differential absorption LiDAR (DIAL).
02
Coherent LiDAR and communicationCoherent fiber communication systems, wind-sensing LiDAR and high-precision atmospheric remote sensing.
03
Seed sources and researchSeed sources for 2 μm-band ultrafast and high-power fiber lasers, and high-resolution molecular spectroscopy.

03 / Core advantages

Core advantages

01
In-house GaSb external cavityA self-developed GaSb gain chip with a PM-FBG external cavity locks the 1950 ±0.1 nm prime band at very high spectral and polarisation purity.
02
Narrow linewidth, high SMSRA spectral linewidth below 0.1 nm with a side-mode suppression ratio above 50 dB ensures high signal-to-noise ratio and accuracy in coherent detection.
03
Integrated standard packageThe international-standard 14-pin butterfly package integrates TEC temperature control and a thermistor in a 30 × 15.2 × 7.7 mm body with FC/APC output for plug-and-play use.
04
Eye-safe with strong absorptionThe 1.95 μm band lies within the eye-safe wavelength range and matches the strong absorption peaks of gases and water, markedly improving detection sensitivity.

04 / Core technical specifications

Core technical specifications

Wavelength
1950 ± 0.1 nm
Output
10 mW
Operating mode
CW
Spectral width
<0.1 nm
Pulse / duty
Continuous wave
Drive
0.3 A / <2 V
Thermal control
15–30 °C
Package
14-pin butterfly
Output interface
FC/APC

04 / Project integration

Integration essentials

Drive
0.3 A / <2 V
Thermal control
15–30 °C
Package
14-pin butterfly
Output interface
FC/APC