1550nm Laser Diode DFB Butterfly Packaged with PM Fiber
DFB butterfly packaged 1550nm laser diode with PM fiber, delivering 20mW stable output and high spectral performance for optical testing, sensing, and communication applications.
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Description
The DFB Butterfly Packaged 1550nm Laser Diode with PM Optical Fiber is a fully integrated laser source designed for high-stability optical applications. Combining a high-performance DFB laser chip with a butterfly package and polarization-maintaining (PM) fiber, this module provides excellent wavelength stability, reliable output power, and easy system integration.
With an output power of 20 mW and a center wavelength around 1550 nm, this module is optimized for precision optical systems, testing instruments, and fiber optic applications. The integrated TEC, monitor photodiode (MPD), and thermistor enable accurate temperature control and output monitoring, ensuring long-term stable operation.
Designed to meet industry standards such as Telcordia GR-468, this module offers high reliability and robust performance, making it ideal for OEM integration and demanding industrial environments.
Key Features
• 1550 nm DFB laser with high spectral stability
• 20 mW stable optical output power
• Polarization-maintaining (PM) optical fiber
• Integrated TEC, thermistor, and monitor photodiode
• High side mode suppression ratio (≥40 dB)
• Telcordia GR-468 compliant
• Low wavelength drift with temperature control
• Compact butterfly package for easy integration
Applications
• Optical test instruments
• Fiber optic communication systems
• Precision optical measurement
• Laser source modules for sensing systems
• Laboratory and research applications
Technical Parameters
| Parameter | Symbol | Test Conditions | Min. | Typ | Max. | Unit |
|---|---|---|---|---|---|---|
| Threshold Current | Ith | @25℃, CW | – | – | 25 | mA |
| Operation Current with TEC | Iop | @25℃ | – | 100 | 300 | mA |
| Optical Output Power | P | @25℃, IF=Iop | 20 | – | – | mW |
| LD Forward Voltage | Vf | IF<=300mA | – | – | 3 | V |
| Center Wavelength | λc | @25℃, IF=Iop | 1547 | 1550 | 1553 | nm |
| Side Mode Suppression Ratio | SMSR | @25℃, IF=Iop | 40 | – | – | dB |
| Isolation | ISO | @25℃, CW | 30 | – | – | dB |
| Monitor Operation Current | IMON | @25℃, CW | 50 | – | 4000 | μA |
| TEC Current | ITEC | – | – | – | 1.6 | A |
| Wavelength temperature coefficient | △λ/△T | – | – | 0.095 | 0.12 | nm/°C |
| Thermistor Resistance | RT | @25℃ | 9.5 | 10 | 10.5 | kΩ |
| Thermistor B-Value | β | 25℃/85℃ | – | 3950 | – | K |
| Fiber Length | – | – | – | 1 | – | m |
| Fiber（Align to slow axis） | – | – | – | PM1550 | – | – |
| Polarization Extinction Ratio | PER | @25℃ | 20 | – | – | dB |
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Storage Temperature | Tstg | -20 | 70 | ℃ |
| Relative Humidity | RH | 0 | 85 | % |
| LD Forward Current with TEC | ILF | – | 300 | mA |
| LD Reverse Voltage | VLR | – | 2 | V |
| PD Reverse Voltage | VR | – | 10 | V |
| TEC Current | Itec | – | 1.8 | A |
| TEC Voltage | Vtec | – | 2.6 | V |
| Lead Soldering Temperature and Time | Tsold/t | – | 260/10 | ℃/s |
| Fiber bend radius | r | 30 | – | mm |
Product Size
Dimensions are in millimeters
Pin Configuration
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | Thermistor | 8 | Case Ground |
| 2 | Thermistor | 9 | Case Ground |
| 3 | Laser (-) | 10 | Null |
| 4 | MPD (+) | 11 | Laser (+) |
| 5 | MPD (-) | 12 | Laser (-) |
| 6 | TEC (+) | 13 | Laser (+) |
| 7 | TEC (-) | 14 | Null |
Ordering Information
Example: LTBF1550-PM520A
| Family Name | Wavelength | – | Fiber Connector | Optical Power | PIN Description |
|---|---|---|---|---|---|
| LTBF | 1550 | – | PM | 2：SC/APC
5：FC/APC |
20: 20mW
A: Type A |
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