Features
- Excellent frequency stability
- Narrow linewidth
- Low noise
- Stable polarization
Overview
This module integrates a high-bandwidth fiber-coupled DFB laser with both an ultra-low noise laser current source and temperature controller, as well as an optical isolator and back facet monitor detector readout amplifier.
The entire module operates from a single +5 V supply and provides a bi‐directional power adjust input that may be used for SBS prevention, for constant power operation in conjunction with the monitor detector readout signal and an external control loop, or for finely adjusting the laser oscillation frequency via chirp. The unit also incorporates a bi‐directional temperature adjust input for coarse tuning of the laser oscillation frequency. The module is designed and built using EM4’s high‐reliability platform for defense components and incorporates an advanced ultra‐low noise laser current source.
Specifications
| Parameter | Sym | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Optical output power setpoint | Pop | 1310 nm devices | 18 | mW | ||
| C-band devices | 10 | mW | ||||
| Center wavelength | λop | 1310 nm devices, 25°C | λop-10 | λop | λop+10 | nm |
| C-band devices, 25°C | λop-1 | λop | λop+1 | nm | ||
| Optical output power fluctuation1 | ΔPop | 1σ, tm=400s, | 65 | 100 | PPM | |
| 0.1s avg and period | ||||||
| Side mode suppression ratio | SMSR | 30 | dB | |||
| Relative intensity noise | RIN | Pop, 0.2-3 GHz | -150 | dBc/Hz | ||
| Linewidth | A | 4 | MHz | |||
| Modulation bandwidth | 10 | 12 | GHz | |||
| Fiber Characteristics | ||||||
| Fiber type | Single-mode, PM or non-PM | |||||