GK Semi

Laser Products

GKCP-1653-005M-CW-00

1653 nm DFB Laser Chip

Locked to the methane absorption peak · Very narrow linewidth | Enabling precision gas detection and industrial safety.

GKCP-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) laser chip is built on an advanced InP-based multi-quantum-well epitaxial structure with single-longitudinal-mode grating feedback. The 1653 nm line sits on the strong near-infrared absorption peak of the methane (CH₄) molecule, and the chip offers mode-hop-free tuning, a high side-mode suppression ratio, very narrow linewidth and low power draw — the core source for TDLAS (tunable diode laser absorption spectroscopy) methane detection systems.

02 / Core application scenarios

Core application scenarios

01
Natural gas and utility safetyPipeline inspection, remote leak-detection instruments and domestic gas alarms.
02
Industrial and mining safetyUnderground coal-mine methane monitoring, gas-leak monitoring in petrochemical parks and chemical plant perimeter safety.
03
Environmental monitoringLandfill methane 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, giving high selectivity free from 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 accuracy in TDLAS spectral tuning.
03
Low power, stable outputA threshold current below 20 mA and 50 mA operating current at 1.2 V deliver stable 5 mW output, well suited to portable handheld gas detectors and remote sensors.
04
Wide tuning and long lifeExcellent current and temperature wavelength tuning coefficients support long-term 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
DFB laser chip
Output interface
Free-space / package dependent

04 / Project integration

Integration essentials

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