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Product Introduction
DFB Laser Diode(Distributed Feedback Laser Diode) is one type of laser typically used in optical communication and optical fiber sensing.Its working principle is based on the concept of Distributed Feedback, by introducing periodic refractive index changes in the semiconductor material, to achieve a high quality laser beam output in a single longitudinal mode.
We could offer customized solution on laser diode,typically we offer 14 PIN butterfly laser diode.
Product Features
1.DFB chip;
2.Wavelengths (1270nm,1290nm…1610nm,1650nm);
3.Low Power (>10mW,20mW,40mW);
4.Multi-Quantum Well (MQW) active layer;
5.Built-in Isolator(double stage),TEC,Rth and PD;
6.FC/APC Connector;
7.Designed for Telcordia-GR468.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings will cause permanent damage and/or adversely affect device reliability.
| Parameter | Conditions | Min | Max | Unit |
| Storage Temperature Range | - | -40 | 85 | °C |
| Storage and Operating Relative Humidity | - | 0 | 95 | % |
| TOSA Case Operating Temperature | - | -5 | 75 | °C |
| Laser Reverse Voltage | - | - | 2 | V |
| Laser Forward Current | - | - | 100 | mA |
| Pin Soldering Temperature (*) | 30s max | - | 300 | °C |
| TEC Current | - | -2.5 | 2.5 | A |
| TEC Voltage | - | -5.4 | 5.4 | V |
(*)local heating only. Package body shall not exceed 85°C. Temperature excursion of 120°C for 60s is permissible.
Optical And Electrical Characteristics
| Parameter | Symbol | Unit | Conditions | Limits | ||
| Min | Typ. | Max | ||||
| Center wavelength | λc | nm | CW,Top | λc-3 | λc | λc+3 |
| Peak Optical Output Power | Po | mW | Top,Iop | 10 | - | - |
| Spectral width(-20dB) | △λ | nm | CW,Iop=Ith+20mA | - | - | 1 |
| Side-mode Suppression Ratio | SMSR | dB | CW | 35 | 45 | - |
| Optical Isolation | - | dB | CW | 50 | - | - |
| Center wavelength stability | DlD | ppm | - | -90 | - | 90 |
| Wavelength temperature tunability | △λ/△T | nm/℃ | - | 0.07 | 0.08 | 0.12 |
| Laser Setting Temperature | Top | ℃ | - | 20 | 25 | 60 |
| Threshold Current | Ith | mA | CW | - | 8 | 20 |
| Slope Efficiency | η | mW/mA | CW output power | 0.08 | 0.2 | 0.4 |
| Operating Current | Iop | mA | - | 20 | - | 100 |
| Monitor Output Current | Im | uA | Top,Iop | 20 | - | 1000 |
| Monitor Dark Current | Id | nA | VrP=5V, not in black box | - | - | 100 |
| Total power dissipation | PTEC | W | Tcase=-5~75℃,CW | - | - | 4 |
| Thermistor | ||||||
| Resistance | Rth | KΩ | Top=25℃ | 9.5 | 10 | 10.5 |
| (Standard 10kΩ@25℃Thermistor) | ||||||
| B constant of Rth | B | K | - | 3800 | 3930 | 4000 |
| Thermistor current | ITC | uA | - | 10 | - | 200 |
| Thermoelectric(TEC) | ||||||
| TEC Current | ITEC | A | Tcase=-5~75℃,Top,Iop | -2 | - | 2 |
| TEC Voltage | VTEC | V | - | -4 | - | 4 |