Optical time domain reflectometry

Details Optical time domain reflectometry Optical time domain reflectometry

1994-04-20

1996-04-02

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359110, H04B 1008

Patent

active

055046177

ABSTRACT:
A waveguide carrying system signals at a first wavelength and OTDR signals at a second wavelength is provided with an optical amplifier and an isolator. The isolator has a high isolation factor at the first wavelength and a low isolation factor at the second wavelength.

REFERENCES:
patent: 5214728 (1993-05-01), Shigematsu et al.
patent: 5280549 (1994-01-01), Barnard et al.
patent: 5319482 (1994-06-01), Tsuchiya et al.
patent: 5363463 (1994-11-01), Kleinerman
patent: 5396569 (1995-03-01), Yanagawa et al.
Nakazawa et al, "Gain-Distribution Measurements along an Ultralong Erbium-Doped Fiber Amplifier Using Optical-Time-Domain Reflectometry", Optics Letters, pp. 1200-1202, vol. 15, No. 21, 1 Nov. 1990, New York.
Mackichan et al, "Innovative Approach to Interspan Fibre Break Location in Fibre Amplifier Repeatered Communication", Electronics Letters, vol. 28, No. 7, 26 Mar. 1992, Stevenage GB, pp. 626-628.
Cheng et al, "Novel Configuration of an Erbium-Doped Fiber Amplifier Using an Optical Circulator", Optical Fiber Communication Conference OFC '92, vol. 5, No. TUL5, 2 Feb. 1992, San Jose, California, p. 69.

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