Raman, pump power control for gain flattening

Details Raman, pump power control for gain flattening Raman, pump power control for gain flattening

2006-08-25

2008-11-04

Bolda, Eric (Department: 3663)

Optical: systems and elements

Optical amplifier

Beam combination or separation

C359S334000

Reexamination Certificate

active

07446934

ABSTRACT:
The present invention aims at providing a method for controlling wavelength characteristics of optical transmission powers by Raman amplification, in which the wavelength characteristics of optical transmission powers are automatically compensated without giving any losses to channel lights to thereby improve transmission characteristics, and an apparatus adopting the same. To this end, the method for controlling wavelength characteristics of optical transmission powers by Raman amplification according to present invention supplies Raman pump light to an optical transmission path (Raman amplifying medium); compensates the wavelength characteristics of optical transmission powers caused by transmission of WDM signal light through the optical transmission path, by gain wavelength characteristics of generated Raman amplification; and monitors the wavelength characteristics of optical transmission powers after Raman amplification to thereby control the gain wavelength characteristics of Raman amplification.

REFERENCES:
patent: 4616898 (1986-10-01), Hicks, Jr.
patent: 5083874 (1992-01-01), Aida et al.
patent: 6151160 (2000-11-01), Ma et al.
patent: 6292288 (2001-09-01), Akasaka et al.
patent: 6307668 (2001-10-01), Bastien et al.
patent: 6342965 (2002-01-01), Kinoshita
patent: 6344922 (2002-02-01), Grubb et al.
patent: 6657778 (2003-12-01), Motoshima et al.
patent: 6882466 (2005-04-01), Shimojoh et al.
patent: 6891661 (2005-05-01), Hayashi et al.
patent: 7110166 (2006-09-01), Onaka et al.
patent: 60-236277 (1985-11-01), None
patent: 01231030 (1989-09-01), None
patent: 6-169122 (1994-06-01), None
patent: 8-248455 (1996-09-01), None
patent: 9-179152 (1997-07-01), None
patent: 9-197452 (1997-07-01), None
patent: 10-073852 (1998-03-01), None
patent: 2000-98433 (2000-04-01), None
Kani et al. Fibre Raman Amplifier for 1520nm band WDM transmission. Electronics Letters. Sep. 3, 1998. vol. 34, No. 18.
Japanese Office Action mailed Nov. 18, 2003 in Japanese Application H11-375092.
“A Broadband Dispersion Compensating Raman Amplifier Pumped by Multi-Channel WDM Laser Diodes”, Emori, et al., Technical Report of IEICE, OCS98-58, 1998-11).
“A High-Performance Optical Spectrum Monitor with High-Speed Measuring Time for WDM Optical Networks”, K Otsuka et al., ECOC97, Conference Publication, No. 448.
“Raman Amplification of Dispersion Compensating Fiber for Loss Reduction and Enlargement of WDM Wavelength Range”, S. Kinoshita et al., OECC97 Technical Digest, Seoul, Korea.
“Capacity Upgrades of Transmission Systems by Raman Amplification”, P.B. Hansen, et al., IEEE Photonics Technology Letters, vol. 9, No. 2.
“Wide-Band and Low Noise Optical Amplification Using Distributed Raman Amplifiers and Erbium-Doped Fiber Amplifiers”, Masuda et al., Electronic Information Communication Academy Electronics Society Congress, B10-161.
“Fiber Raman Amplifiers for 1520 nm Band WDM Transmission”, Kani et al., Electronic Information Communication Academy Society Congress, B-10-160.
Stimulated Raman Scattering Effects in WDM Transmission Systems Employing Non-zero Dispersion Shifted Fibers, T. Hoshida et al.
Marhic et al. Suppression of fiber nonlinearities in HFC systems by distributed fiber Raman Amplification; 1999 Digest of LEOS Summer Topical Meetings: Jul. 26, 1999-Jul. 30, 1999; pp. IV53-IV54.
Takeda et al., Active Gain-Tilt Equalization by Preferentially 1.43 microns or 1.48 microns Pumped Raman Amplification; OSA Tops. vol. 30, Optical Amplifiers and Their Applications; Jun. 9-11, 1999; pp. 101-105.

Affiliated with

Also associated with

Rating

Raman, pump power control for gain flattening does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Raman, pump power control for gain flattening, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Raman, pump power control for gain flattening will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4045798