Temperature-compensated rare earth doped optical waveguide ampli

Details Temperature-compensated rare earth doped optical waveguide ampli Temperature-compensated rare earth doped optical waveguide ampli

1998-11-20

2000-04-11

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

359341, 372 32, 385 37, G02B 634, H01S 330, H04J 1402

Patent

active

06049414&

ABSTRACT:
In accordance with the invention, a temperature-dependent rare earth doped waveguide optical amplifier is compensated by a temperature-dependent loss filter. The filter characteristics are designed to be temperature-dependent filters so that the gain characteristic of the amplifier is compensated over a practical operating temperature range. In essence, the amplifier comprises a length of optical waveguide for transmitting optical signals, a rare earth doped amplifying region in the waveguide for amplifying the transmitted optical signals, a pumping source for optically pumping the amplifying region, and a temperature-dependent loss filter. A typical design compensates an EFDA to a variation of less than 1 dB over a temperature range of -40.degree. C. to 85.degree. C. and a spectral range of at least 20 nm.

REFERENCES:
patent: 5042898 (1991-08-01), Morey et al.
patent: 5703978 (1997-12-01), DiGiorvanni et al.
patent: 5757540 (1998-05-01), Judkins et al.
Lee et a, OFC '98, Tech. Digest, vol. 2, pp 133-134, Feb. 27, 1998.
Lee et al, IEEE Photonics Tech. Letters, vol. 101 #8, pp 1168-1170, Abstract herewith, Aug. 1998.
Viveh et al, IEEE Trans. a lust. & Meas., vol. 46, #5; abst. only herewith, Oct. 1997.

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