The 1572nm DFB Laser Diode is designed for tunable diode laser absorption spectroscopy (TDLAS) and gas sensing applications, including CO and CO₂ detection systems where the selected absorption line matches the laser tuning range. It provides a typical optical output power of 9mW, typical side-mode suppression ratio of 45dB, and a wavelength range of 1572.3–1574.3nm. Package options include TO-56, TO-60 and other custom TO packages, with optional TEC or heater-assisted temperature control available according to project requirements.
- Description
Description
1572nm DFB Laser Diode Overview
The 1572nm DFB Laser Diode is developed for narrow-linewidth optical sensing and tunable diode laser absorption spectroscopy applications. Its emission wavelength covers approximately 1572.3–1574.3nm, with a typical optical output power of 9mW under the specified test conditions.
The device combines DFB single-mode operation, high side-mode suppression and current- and temperature-dependent wavelength tuning, making it suitable for gas sensing systems that require controlled wavelength scanning across a target absorption line.
Key Features
- DFB laser diode operating around 1572nm
- Peak wavelength range: 1572.3–1574.3nm
- Typical optical output power: 9mW
- Typical side-mode suppression ratio: 45dB
- Typical threshold current: 14mA
- Typical slope efficiency: 0.24mW/mA
- Typical wavelength temperature coefficient: 0.1nm/°C
- Typical current tuning coefficient: 0.039nm/mA
- TO-56, TO-60 and other custom TO-package options
- Optional TEC temperature control
- Optional heater-assisted temperature control
- Suitable for TDLAS and gas sensing integration
Technical Specifications
| Parameter | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Threshold Current | Ith | CW, Tc = 25°C | — | 14 | 25 | mA |
| Forward Voltage | Vf | CW, Tc = 25°C, If = 30mA | 0.5 | — | 2.0 | V |
| Optical Output Power | Po | CW, Tc = 25°C, Iop = 50mA | 4 | 9 | — | mW |
| Slope Efficiency | SE | CW, Tc = 25°C, Po = 1–4mW | 0.1 | 0.24 | — | mW/mA |
| Side Mode Suppression Ratio | SMSR | CW, Tc = 25°C, Iop = 50mA | 35 | 45 | — | dB |
| Resistance | Rs | CW, Tc = 25°C, Po = 1–4mW | — | 7 | — | Ω |
| Peak Wavelength | λ | CW, Tc = 25°C, Iop = 50mA | 1572.3 | — | 1574.3 | nm |
| Wavelength Temperature Coefficient | Δλ/ΔT | Top = 0°C to +70°C | — | 0.1 | — | nm/°C |
| Current Tuning Coefficient | Δλ/ΔI | — | — | 0.039 | — | nm/mA |
| Beam Divergence ⊥ | θ⊥ | CW, Po = 5mW | — | 28 | — | degree |
| Beam Divergence // | θ// | CW, Po = 5mW | — | 24 | — | degree |
Wavelength Tuning Characteristics
The 1572nm DFB laser supports wavelength tuning through both drive current and device temperature. The typical wavelength temperature coefficient is 0.1nm/°C, while the typical current tuning coefficient is 0.039nm/mA. These tuning characteristics allow the laser wavelength to be scanned across a selected gas absorption feature in TDLAS systems.
Actual tuning range and operating point depend on drive conditions, package thermal design and the target absorption line used in the sensing system.
High Side-Mode Suppression
The laser provides a minimum side-mode suppression ratio of 35dB and a typical value of 45dB under the stated test conditions. High SMSR helps maintain stable single-mode emission, which is important for absorption spectroscopy and wavelength-selective gas measurement.
CO and CO₂ Gas Sensing Applications
The 1572nm DFB laser can be used in TDLAS-based CO and CO₂ sensing systems where the selected molecular absorption line is compatible with the available wavelength and tuning range. The combination of narrow-band DFB emission, current tuning and temperature tuning supports precision wavelength scanning for gas concentration measurement.
For gas sensing projects, the final laser configuration should be selected according to the target gas, absorption line, required optical power, tuning range, operating temperature and optical path design.
Package Options
The 1572nm DFB laser can be supplied in multiple TO-package configurations according to system integration requirements.
| Package Option | Description |
|---|---|
| TO-56 | Compact TO package suitable for small optical sensing modules. |
| TO-60 | Available for designs requiring different package dimensions or thermal configurations. |
| Custom TO Package | Other TO package configurations can be evaluated according to project requirements. |
TEC and Heater Options
For applications requiring tighter wavelength control, the laser can be supplied with TEC-based temperature stabilization or a heater-assisted thermal-control configuration, depending on the package design and customer requirements.
- TEC option for active temperature stabilization
- Heater option for controlled thermal tuning
- Package and thermal configuration can be evaluated for OEM projects
- Final wavelength operating range depends on the selected thermal design and drive conditions
Typical Applications
- TDLAS gas sensing
- CO₂ concentration measurement
- CO gas detection
- Industrial gas analyzers
- Environmental gas monitoring
- Process gas measurement
- Optical absorption spectroscopy
- OEM gas sensing modules
OEM and Customization Support
LumiLaserChip can support project-based DFB laser selection and packaging according to required wavelength, optical power and thermal-control specifications. Available options can include TO-56, TO-60 and other TO packages, together with TEC or heater-assisted thermal control depending on the application.
When requesting a customized 1572nm DFB laser, please provide the target gas, required absorption wavelength, optical output power, preferred package, temperature-control method, sample quantity and estimated annual demand.
Request a Quote
Contact LumiLaserChip for pricing, samples, lead time and technical evaluation for the 1572nm DFB Laser Diode for CO and CO₂ gas sensing. Please provide your target wavelength, gas species, package type and thermal-control requirements so that the appropriate DFB laser configuration can be evaluated.
