Spectral linewidth of semiconductor lasers
Technical Report
·
OSTI ID:6908979
The semiconductor diode laser (SL) has a number of properties that make it a desirable light source for spectroscopy. Aside from the advantages in size, cost, and complexity, SL's cover a broad spectral range and may easily be modulated at rates up to several gigahertz. However, coherence remains an issue in many applications. Here the issue of the ultimate SL linewidth is considered. Included is a discussion of SL spectral characteristics including the enhanced Lorentzian linewidth, the power-independent linewidth, and the fine structure in the field power spectrum. Also discussed are the prospects for line narrowing through active frequency control and present heterodyne measurements between two independently operating external-cavity (GaA1)As lasers. Finally, such stable, narrow-line sources can easily be phase-locked.
- Research Organization:
- Massachusetts Inst. of Tech., Lexington (USA). Lincoln Lab.
- OSTI ID:
- 6908979
- Report Number(s):
- AD-A-172605/8/XAB; MS-7096
- Country of Publication:
- United States
- Language:
- English
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