Frequency stabilization of 1.5-μm InGaAsP distributed feedback laser to NH3 absorption lines
- 15 October 1984
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 45 (8) , 826-828
- https://doi.org/10.1063/1.95432
Abstract
NH3 absorption lines due to vibration‐rotation transitions are observed at 1.50–1.54 μm by using an InGaAsP superluminescent diode. A 1.5‐μm InGaAsP distributed feedback (DFB) laser is frequency stabilized to an NH3 linear absorption line at 15196 Å. Frequency stability of σ(2,τ)=8×10−11τ−1 is achieved for an averaging time range of 10 ms≤τ≤1 s. Such an absolute frequency‐stabilized DFB laser is useful for coherent optical system applications, since it is free from the longitudinal mode jumping which results from a wide range of temperature changes and long‐term device degradation.Keywords
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