Abstract
Continuous tuning over a 1.6 THz region in the near-infrared (842.5-848.6 nm) has been achieved with a hybrid ring/external cavity laser having a single, optically-driven grating reflector and gain provided by an injection-seeded semiconductor amplifier. Driven at 532 nm and incorporating a photonic crystal with an azobenzene overlayer, the reflector has a peak reflectivity of ̃80% and tunes at the rate of 0.024 nm per mW of incident green power. In a departure from conventional ring or external cavity lasers, the frequency selectivity for this system is provided by the passband of the tunable photonic crystal reflector and line narrowing in a high gain amplifier. Sub - 0.1 nm linewidths and amplifier extraction efficiencies above 97% are observed with the reflector tuned to 842.5 nm.
Original language | English (US) |
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Pages (from-to) | 14292-14301 |
Number of pages | 10 |
Journal | Optics Express |
Volume | 20 |
Issue number | 13 |
DOIs | |
State | Published - Jun 18 2012 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics