Optical amplifier, method for compensating for temperature...

Details Optical amplifier, method for compensating for temperature... Optical amplifier, method for compensating for temperature...

2005-12-13

2005-12-13

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S337400

Reexamination Certificate

active

06975446

ABSTRACT:
An optical amplifier has a gain flatness which is maintained to be substantially constant regardless of temperature changes. The optical amplifier includes an EDF amplifying section and a Raman amplifying section, the Raman amplifying section having a temperature dependent gain profile which enables compensating for the temperature dependent gain profile of the EDF amplifying section. The Raman amplifying section includes a wavelength lock grating whose transmission wavelengths shift toward the short wavelength side as the temperature increases. The wavelength lock grating is preferably disposed to have the same temperature as that of an EDF of the EDF amplifying section. A method for compensating for temperature dependency of gain flatness of an optical amplifier and an optical transmission path including an optical amplifier are also disclosed.

REFERENCES:
patent: 6049414 (2000-04-01), Espindola et al.
patent: 6583922 (2003-06-01), Srikant et al.
Perlin et al, “ON Trade-off between noise and nonlinearity in WDM systems with ditributed Raman amplification”, 2002, OFC 2002, pp. 178-180.
Mototaka Kakui et al., Technical Digest of Optical Fiber Communication Conference, USA, Mar. 8, 2000, pp. 6-8, WA3.
Yuu Ishii et al., Proceedings of Topical Meeting on Optical Amplifiers and their Applications, Italy, Jul. 1, 2001, pp. 114-116.
3. Hiroji Masuda, Technical Digest of Optical Fiber Communication Conference, USA, Mar. 7, 2000, p.p. 2-4, TuA1.

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