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Proceedings Paper

High-Q microsphere cavity for laser stabilization and optoelectronic microwave oscillator
Author(s): Vladimir S. Ilchenko; X. Steve Yao; Lute Maleki
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Paper Abstract

With submillimeter size and optical Q up to approximately 1010, microspheres with whispering-gallery (WG) modes are attractive new component for fiber-optics/photonics applications and a potential core in ultra-compact high- spectral-purity optical and microwave oscillators. In addition to earlier demonstrated optical locking of diode laser to WG mode in a microsphere, we report on microsphere application in the microwave optoelectronic oscillator, OEO. In OEO, a steady-state microwave modulation of optical carrier is obtained in a closed loop including electro- optical modulator, fiber-optic delay, detector and microwave amplifier. OEO demonstrates exceptionally low phase noise (-140 dBc/Hz at 10 kHz from approximately 10 GHz carrier) with a fiber length approximately 2 km. Current technology allows to put all parts of the OEO, except the fiber, on the same chip. Microspheres, with their demonstrated Q equivalent to a kilometer fiber storage, can replace fiber delays in a truly integrated device. We have obtained microwave oscillation in microsphere-based OEO at 5 to 18 GHz, with 1310 nm and 1550 nm optical carrier, in two configurations: (1) with external DFB pump laser, and (2) with a ring laser including microsphere and a fiber optic amplifier. Also reported is a simple and efficient fiber coupler for microspheres facilitating their integration with existing fiber optics devices.

Paper Details

Date Published: 24 May 1999
PDF: 9 pages
Proc. SPIE 3611, Laser Resonators II, (24 May 1999); doi: 10.1117/12.349244
Show Author Affiliations
Vladimir S. Ilchenko, Jet Propulsion Lab. (United States)
X. Steve Yao, Jet Propulsion Lab. (United States)
Lute Maleki, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3611:
Laser Resonators II
Alexis V. Kudryashov, Editor(s)

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