2007年
Rb-saturated-absorption-profile-based enhancement of semiconductor laser frequency stability
PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XV
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- 巻
- 6468
- 号
- 開始ページ
- 64680C
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.1117/12.698300
- 出版者・発行元
- SPIE-INT SOC OPTICAL ENGINEERING
Laser interferometers detect gravitational waves with a degree of accuracy and efficiency unimaginable even a few years ago. The semiconductor lasers that are the primary light source for these devices are small, lightweight, durable and energy-efficient. On the downside, the devices currently available are still marked by broad oscillation spectra, and heightened sensitivity to fluctuations in injection current and /or ambient temperature. By applying a small sine wave to the injection current, we modulate the oscillation frequency. This frequency-modulated beam is introduced to the Avalanche photo diode through the Rb cell in the saturated absorption optical setup. The resulting signal and a reference signal are detected simultaneously and combined, to produce an error signal, which, when fed back to the injection current, stabilizes the diode's oscillation frequency at 2.12x10(-12) <= sigma(2,tau)<= 5.88x10(-11) in the averaging time between 0.4s to 65s. An optical feedback method, which introduces the laser beam reflected by a mirror or a grating to the semiconductor laser itself, is reported to narrow oscillation linewidth and improve frequency stability. We are now combining these two techniques to further improve frequency stability.
- リンク情報
- ID情報
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- DOI : 10.1117/12.698300
- ISSN : 0277-786X
- Web of Science ID : WOS:000246056200009