Single-lobe phased-array diode lasers
Abstract
It has been observed that multistripe diode laser arrays operate phase-locked in coupled modes often referred to as supermodes. The present investigation is concerned with a general design principle which favors nu = 1 supermode operation by lowering the threshold of that supermode relative to the others. Intuitive arguments are supported analytically. It is shown that a real-refractive-index phased-array diode laser will favor operation in the lowest-order supermode radiating into a single narrow far-field lobe if the gain between the waveguides exceeds that in the guides themselves.
- Publication:
-
Electronics Letters
- Pub Date:
- January 1985
- DOI:
- 10.1049/el:19850082
- Bibcode:
- 1985ElL....21..118S
- Keywords:
-
- Coupled Modes;
- Laser Modes;
- Phase Locked Systems;
- Phased Arrays;
- Semiconductor Lasers;
- Power Gain;
- Waveguides;
- Lasers and Masers