The PL-NL series directly modulated external cavity laser is cost effective solution for 2.5 Gbits/s digital transmission in SMF-28 fiber. This is fabricated in a hermetically sealed 14-pin butterfly package that contains thermoelectric cooler (TEC), thermistor, monitor photodiode, optical isolator.
The PL-NL provides substantially lower dispersion penalty and lower chirp than a directly modulated DFB. The wavelength stability is assured by design, eliminating the need for wavelength lockers and complex feedback control circuits.
Optical Characteristics (at 25 °C laser temperature)
Parameter | Symbol | Condition | Min. | Typical | Max. | Unit |
Center Wavelength | λc | TL=15～35℃ CW | 1549.62 | 1550.12 | 1550.62 | nm |
Peak Optical Output Power | PO | - |
| 100 | - | mW |
Spectral linewidth | LW | - | - | 0.5 | 1 | MHz |
Side-mode Suppression Ratio | SMSR | CW | 30 | 40 | - | dB |
Optical Isolation | - | -10 < TC < +70 ºC | 30 | - | - | dB |
Polarization Extinction Ratio | ER | - | 20 | - | - | dB |
Relative Intensity Noise | RIN | CW, output power 5mW | - | - | -135 | dB |
Wavelength drift with case (-10 to 70 ºC) temperature | △λ | TL=15～35℃ | - | - | ±30 | pm |
Wavelength Temperature coefficient | Δλ/ΔT | TL=15～35℃ | - | 15 | 30 | pm/ºC |
Wavelength Current coefficient | Δλ/ΔΙ | - | - | 1.5 | 2 | pm/mA |
Electrical Characteristics (at 25 °C laser temperature)
Parameter | Symbol | Condition | Min. | Typical | Max. | Unit |
Threshold Current | ITH | - | - | 40 | 50 | mA |
Slope Efficiency | ƞ | CW output power 100 mW | 0.064 | 0.1 | - | mW/mA |
Operating current | Iop | CW | - | 500 | 700 | mA |
TEC set temperature | Ts | - | 15 | - | 35 | ℃ |
Laser Forward Voltage | VF | CW output power 100 mW | - | 1.3 | 1.8 | V |
Monitor Dark Current | ID | - | - | - | 0.1 | μA |
Input Impedance | ZIN | - | 22 | 25 | 28 | Ω |
Thermistor Current | ITC | - | 10 | - | 100 | μA |
Thermistor Resistance | RTH | TL = 25 °C | 9.5 | 10 | 10.5 | KΩ |
TEC Current | ITEC | TL = 25 °C, TC = 70 °C | - | - | 1.8 | A |
TEC Voltage | VTEC | TL = 25 °C, TC = 70 °C | - | - | 3.5 | V |
TEC capacity | ΔT | Tc = 70℃ | - | - | 50 | °C |
Thermistor temperature | - | - | - | - | 100 | °C |
Fiber Pigtail Specifications
Parameters | Description |
Fiber Type | PM fiber |
Jacket Type | 900μm loose tube |
Pigtail Length | 1.0±0.1m |
Connector Type | FC/APC |
PM fiber Connector Orientation | Please see the right figure |
Note: The PM fiber and the connector key are aligned to the slow axis,fast axis is blocked.
1550nm Ultra High power SM Narrow Linewidth Laser Diodes.pdf
