Accession Number:

ADA503334

Title:

Towards an Integrated Optic Phase-Locked Oscillator

Descriptive Note:

Conference paper

Corporate Author:

SANDIA NATIONAL LABS ALBUQUERQUE NM

Report Date:

2008-12-01

Pagination or Media Count:

11.0

Abstract:

A recent experiment, performed at the Massachusetts Institute of Technology, has demonstrated that by locking a microwave oscillator to an optical pulse train from a modelocked laser, exceptional timing stability can be achieved. In the experiment, a 10.225-GHz microwave oscillator was locked to an optical phase detection apparatus consisting of a modelocked laser, a Sagnac interferometer, and an optical phase modulator. A relative out-of-loop timing jitter of 6.8 femtoseconds root mean squared was measured between the locked oscillator and the optical pulse train over a 1-MHz bandwidth and a 10-hour integration period, corresponding to a stability of 1.9 x 10exp negative 19. Here, we consider the potential for an integrated version of this optical phase-locked oscillator. Detailed analysis of the components required for integration is used to estimate the timing performance of the integrated optic phase-locked oscillator. Initial estimates indicate potential for a single-sideband phase noise level of -153 dBcHz and corresponding jitter level of approx. 1 femtosecond across a 10-MHz loop bandwidth. While this work is still in the design stages, if successful, the result will be a compact and low-power oscillator with exceptional phase noise and timing stability that can be applied across many applications including RADAR, global positioning, and communications systems.

Subject Categories:

  • Electrical and Electronic Equipment
  • Test Facilities, Equipment and Methods
  • Optics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE