Abstract
We have analyzed the behavior of a diode laser with low-amplitude optical injection. The noisy injection field has phase fluctuations only, with a linewidth larger than both the free-running slave laser linewidth and the locking range. Simulations show that the laser output spectrum can be much narrower than the injection spectrum and may have a dip at the free-running laser frequency. A model describing these features is based on linear superposition of the stationary responses to monochromatic injection. The mechanism of line narrowing is that the response to injection outside the locking range lies mainly inside.
| Original language | English |
|---|---|
| Pages (from-to) | 434-442 |
| Number of pages | 9 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 33 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Mar 1997 |
| Externally published | Yes |
Funding
Manuscript received July 12, 1996; revised October 10, 1996. The work of W. A. van der Graaf was supported by the Foundation for Fundamental Research on Matter (FOM), which is supported by the Netherlands Organization for Scientific Research (NWO). The work of A. M. Levine was supported in part by NWO.
Keywords
- Injection locking
- Noisy injection
- Phase fluctuation
- Semiconductor laser