These lasers are designed as pump sources for Erbium-Doped Fiber Amplifier (EDFA) applications. Processes and techniques of coupling the fiber to the laser allow high output powers that are very stable with both time and temperature. The grating is located in the pigtail to stabilize the wavelength. Devices are available with kink free output powers to 300mW. The LC94 series pump module utilises a fiber Bragg Grating design for enhanced wavelength and power stability performance. This product has been designed to ensure superior wavelength locking over drive current, temperature and optical feedback changes.
Features
• Fiber Bragg Grating wavelength stabilization
• High output power, up to 300mW kink free
• Single-mode fiber pigtail
• Internal thermoelectric heatpump and monitor photodiode
• Hermetically sealed 14-pin butterfly package
• Telcordia GR-468-CORE compliant
• Field proven high reliability
• RoHS compliant
Applications
• Low noise EDFAs
• Dense wavelength division multiplexing (DWDM) EDFAs
• CATV Applications
Operating Characteristics
Conditions unless otherwise stated: Case temperature -20 to 75 ºC
Submount temperature 25 ºC
Monitor diode bias -5V
CW operation
Specifications
• Operating Characteristics
Parameter | Min | Typ | Max | Unit |
Threshold current(lth) | | 30 | 40 | mA |
Operating drive current (lf) | ZC thru ZD | | | 250 | mA |
ZE thru ZF | | | 300 | mA |
ZG thru ZJ | | | 350 | mA |
ZK thru ZM | | | 400 | mA |
A thru B | | | 450 | mA |
C thru E | | | 500 | mA |
F thru K | | | 550 | mA |
L | | | 600 | mA |
Forward voltage | | 1.9 | 2.5 | V |
Centre wavelength (λc) | | 974 | | nm |
Spectral width (RMS@-13dB) | | 0.2 | 1 | nm |
Spectrum stability (t=60secs) | | | ±0.5 | nm |
Temperature dependence of peak Wavelength | | | 0.02 | nm/℃ |
Wavelength toletance | | | ±0.5 | nm |
Monitor detector responsivity | 1.0 | | 10 | μa/mW |
Monitor dark current | | | 50 | nA |
Thermistor resistance (at 25 ºC) | 9.5 | 10 | 10.5 | kΩ |
Thermistor BETA value (±1%) | | 3575±1% | | k |
Intended laser submount operating temperature | 20 | 25 | 30 | ℃ |
Power stability Peak-to-peak, t=60s, DC to 50KHz sampling, Tc=25 ºC >20mW 10-20mW | | | 0.05 0.1 | dB dB |
Heatpump current(ΔT=50℃, lf=500mA) | | | 1.3 | A |
Heatpump voltage(ΔT=50℃, lf=500mA) | | | 2.5 | V |
• Absolute Maximum Ratings
Parameter | Min | Max | Unit |
Operating temperature | -20 | 75 | ℃ |
Storage temperature | -40 | 85 | ℃ |
Laser forward current | | 800 | mA |
Laser reserve voltage | | 2 | V |
Heatpump current | | 2.2 | A |
Lead soldering temperature(10s max) | | 350 | ℃ |
Fiber bend radius | 20 | | mm |
|