Cooled 1653.7nm DFB Laser Diode for Methane Gas Sensing TO Package (TEC Integrated)
DFB cooled 1653.7nm laser diode with integrated TEC for methane gas sensing, delivering high wavelength stability and precision for TDLAS-based gas detection systems.
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Description
The Cooled 1653.7nm DFB Laser Diode is designed for high-precision methane (CH₄) gas sensing applications based on TDLAS technology. Equipped with an integrated thermoelectric cooler (TEC), this device provides superior wavelength stability and precise temperature control, ensuring accurate gas detection under varying environmental conditions.
Operating at the methane absorption wavelength around 1653.7 nm, this laser diode enables highly sensitive and selective gas measurement. Compared to standard heating-type devices, the cooled DFB design offers enhanced stability, lower wavelength drift, and improved measurement accuracy, making it suitable for demanding sensing environments.
With a compact TO package and 6-pin configuration, this device integrates laser emission, temperature control, and monitoring functions into a single module. It is ideal for high-end gas detection systems, industrial monitoring, and environmental sensing applications where precision and reliability are critical.
Key Features
• Optimized 1653.7 nm wavelength for CH₄ detection
• Integrated TEC for precise temperature control
• Low threshold current down to 10 mA
• High wavelength stability and low drift
• Compact TO package with 6-pin configuration
• Low TEC power consumption
• Wide operating temperature range (-5°C to 75°C)
• High reliability for long-term operation
Applications
• Methane (CH₄) gas sensing systems
• TDLAS high-precision detection modules
• Industrial gas monitoring
• Environmental sensing and emission monitoring
• Safety and leak detection systems
Technical Parameters
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Threshold Current | Ith | 25°C | 10 | 15 | – | mA |
| Operating Voltage | Vop | Iop = 50 mA | 1.2 | 1.6 | – | V |
| Output Power | Po | Iop = 50 mA | 4 | 6 | – | mW |
| Slope Efficiency | SE | If = 25–65 mA | 0.15 | 0.2 | – | mW/mA |
| Center Wavelength | λc | Iop = 50 mA | 1652.7 | 1653.7 | 1654.7 | nm |
| SMSR | SMSR | Iop = 50 mA | – | 35 | – | dB |
| Temperature Coefficient | Tλ | Iop = 50 mA | – | 0.1 | – | nm/°C |
| Current Coefficient | Iλ | Iop = 50 mA | – | 0.02 | – | nm/mA |
| Resistance | Rs | – | – | 15 | – | Ω |
| TEC Current | ITEC | – | – | 1.0 | – | A |
| TEC Voltage | VTEC | – | – | 1.2 | – | V |
All data are tested at 25°C
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Forward Current | If | – | 100 | mA |
| Laser Reverse Voltage | VRL | – | 2 | V |
| Operating Temperature | To | -5 | 75 | °C |
| Storage Temperature | TSTG | -40 | 100 | °C |
Product Size
Pin Configuration
| Pin | Function |
|---|---|
| 1 | TEC (-) |
| 2 | Thermistor |
| 3 | LD (+) |
| 4 | TEC (+) |
| 5 | Thermistor |
| 6 | LD (-) |
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