TDLAS-WMS Water Vapor Laser Sensor H2O DFB Laser 1392.54nm Wavelength mode-hop-free tuning range
1392.54 nm TDLAS-WMS Water Vapor Laser Sensor H2O DFB Laser is designed specifically for the laser sensor solutions. 1392nm DFB Butterfly Laser has high output power and wide temperature range. 1392nm 14-pin butterfly packages are pincompatible with standard SONET OC-48 devices.
Advanced Multiple Quantum Well (MQW);
Distributed Feedback (DFB) Laser Design;
High-output power;
Industry-standard 14-pin Butterfly package;
Option of SMF-28 Fiber Pigtail or PM fiber.
Laser Solutions:
Sensor development;
Methane Gas detection;
External modulation.
Datasheet :
Center Wavelength 1391.5 1392 1392.5 nm
Optical Output Powe Po 10mW
Threshold Current TH 10 35 mA
Slope Efficiency CW output power 5mW 0.05 0.08 0.2mW/mA
Operating current Iop Po=10mW(CW) 100 200mA
Spectral linewidth LW FWHM 2 MHz
Laser Forward Voltage VF CW output power 5mW
Monitor Dark Current ID 0.1 uA
Bandwidth(@-3dB) BW 2.5 GHz
Side-mode Suppression Ratio SMSR CW 35 40dB
Optical Isolation ISO -10<Tc<+70 30dB
Relative Intensity Nosie RIN CW, output power 5mW dB
Frequency range 5 1002 MHz
Frequency Response Flatness S21 IF = 60mA, 5MHz-1002MHz -0.75 0.75 dB
TEC set temperature Ts 15 35
Input Impedance ZIN 22 25 28
Thermistor Current 10 uA
Thermistor Resistance RTH TL = 25 9.5 10 10.5
TEC current ITEC TL = 25 , TC= 70 A
TEC voltage VTEC TL = 25 , TC= 703.5 V
Thermistor temperature 100
What is TDLAS-WMS
TDLAS-WMS (Tunable Diode Laser Absorption Spectroscopy with Wavelength Modulation Spectroscopy) is a highly sensitive gas detection and concentration measurement technique. By combining laser absorption with rapid signal modulation, it achieves exceptional sensitivity and immunity to background noise, making it ideal for continuous, non-contact industrial and environmental monitoring.
Laser Tuning: A tunable diode laser emits light at a wavelength specifically chosen to match the target gas's unique molecular absorption lines.
Modulation (WMS): A high-frequency sinusoidal modulation is superimposed on the laser's drive current. This modulates the laser's wavelength rapidly across the gas absorption peak
High Sensitivity: WMS effectively shifts the detection frequency away from the laser’s low-frequency (1/f) noise, greatly improving the Signal-to-Noise Ratio (SNR) and allowing for trace gas detection in the parts-per-million (ppm) or parts-per-billion (ppb) ranges.
