High stability fiber light source

Details High stability fiber light source High stability fiber light source

1998-06-30

2000-11-07

Healy, Brian

Optical waveguides

With optical coupler

Input/output coupler

385 38, 385 39, 385 24, 385 37, 385 12, 372 6, 359115, 359124, 359134, 359341, 356345, G02B 626, H01S 330, H04J 1400, G01B 902

Patent

active

061447889

ABSTRACT:
A fiber light source having, for instance, a 980 nm pump laser for pumping an erbium-doped optical fiber via a 980/1550 nm WDM coupler. The pumped fiber emits 1550 nm light. A portion of the 1550 nm light goes to a filter via the WDM coupler. The filter shapes the spectrum of the 1550 nm light. The filter is a passive device that may be made from erbium-doped fiber. From the filter the 1550 nm light goes through an isolator or a circulator on to an optical device for which the light is specially made. Such device may be an fiber optic gyroscope. By adding a narrowband optical fiber grating at the output of the pump laser to tune its output, the fiber light source is further improved in stability under variations of ambient temperature and light source drive current.

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Authors: H. J. Patrick, A. D. Kersey, W. K. Burns and R. P. Moeller, "Erbium-Doped Superfluorescent Fibre Source With Long Period Fibre Grating Wavelength Stabilisation" Electronics Letters, GB, IEE Stevenage, vol. 33, No. 24, pp. 2061-2063 EP-000734308 ISSN: 0013-5194 (The Whole Document).
Authors: Douglas C. Hall, William K. Burns and Robert P. Moeller, "High-Stability ER3+-Doped SuperfluorescentFiber Sources", Journal of Lightwave Technology, US, IEEE, New York, vol. 13, No. 7, pp. 1452-1460 XP-000597669 ISSN: 0733-8724, p. 1453; figure 1.
Authors: L. Goldberg, R. P. Moeller and W. K. Burns "High-Power 1.5-MUM Superfluorescent Source For Fiber-Optic Gyroscopes" Conference on Optical Fiber Communications, US, New York, IEEE, pp. 28-29, XP-000776390 ISBN: 0-7803-3860-X (The whole document).
Authors: C. R. Giles, T. Erdogan and V. Mizrahi "Reflection-Induced Changes In The Optical Spectra of 980-nm QW Lasers" IEEE Photonics Technology Letters, US, IEEE Inc. New York, vol.6, No. 8, pp. 903-906 XP-000465478 ISSN: 1041-1135, pp. 903; Figure 1.

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