GK Semi

Laser Products

GKLD-1653-005M-CW-00

1653 nm DFB Laser

Locked to the methane absorption peak · Packaged and ready to integrate | A core source for high-precision TDLAS gas sensing.

GKLD-1653-005M-CW-00 product photograph
Wavelength1653 ± 1 nm
Output5 mW
Operating modeCW
Spectral width0.35 nm FWHM
Pulse / dutyContinuous wave

01 / Product introduction

Product introduction

This 1653 nm 5 mW DFB (distributed feedback) semiconductor laser is built on an advanced InP multi-quantum-well epitaxial structure with single-longitudinal-mode grating feedback. Its centre wavelength matches the strong near-infrared absorption peak of methane (CH₄) precisely, and it is supplied as a finished package rather than a bare die — removing die-attach and wire-bonding from the customer's process for TDLAS methane detection systems.

02 / Core application scenarios

Core application scenarios

01
Urban gas and natural gas safetyLaser pipeline inspection instruments, handheld gas detectors and domestic gas alarms.
02
Industrial and mining safetyUnderground coal-mine methane monitoring systems and perimeter gas-leak monitoring at petrochemical parks.
03
Environmental monitoring and carbon neutralityLandfill and agricultural emission monitoring, greenhouse-gas concentration remote sensing and atmospheric analysis.

03 / Core advantages

Core advantages

01
Precise wavelength matchThe emission line is locked at 1653 ±1 nm on the strong methane absorption peak, free from cross-interference by water vapour, CO₂ and other background gases.
02
Single mode, very narrow linewidthA 0.35 nm FWHM spectral width with single-longitudinal-mode output ensures high resolution and detection sensitivity in TDLAS absorption spectroscopy.
03
Mode-hop-free continuous tuningWavelength tunes continuously without mode hopping via injection current and operating temperature, improving response speed and measurement accuracy.
04
Low power, wide-temperature stabilityA threshold current below 20 mA keeps consumption very low for portable and battery-powered equipment, with drift-free operation across 0–70 °C.

04 / Core technical specifications

Core technical specifications

Wavelength
1653 ± 1 nm
Output
5 mW
Operating mode
CW
Spectral width
0.35 nm FWHM
Pulse / duty
Continuous wave
Drive
50 mA / 1.2 V
Thermal control
0–70 °C
Package
Packaged DFB laser
Output interface
Free-space / package dependent

04 / Project integration

Integration essentials

Drive
50 mA / 1.2 V
Thermal control
0–70 °C
Package
Packaged DFB laser
Output interface
Free-space / package dependent