Optical demultiplexing module, optical multiplexing module and h

Details Optical demultiplexing module, optical multiplexing module and h Optical demultiplexing module, optical multiplexing module and h

1994-11-02

1996-04-23

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359629, G02B 2714

Patent

active

055109322

ABSTRACT:
The optical demultiplexing module of the present invention includes a square or rectangular housing body, a first collimator and a second collimator being provided normal to opposing sides of the housing body, respectively, a third collimator being provided normal to a side of the housing body at right angles to the opposing sides, a multiplexer, an optical isolator and a beam splitter being provided at the output end of the optical isolator, the multiplexer, the optical isolator and the beam splitter being provided in linear alignment, and a reflector mirror being provided on the optical axis of the pumping light to be admitted into the housing body from the third collimator. The second collimator is provided on the optical axis of the light passing through the beam splitter. The multiplexer is provided on the optical axis of the light to be reflected from the reflector mirror. The first collimator is provided on the optical axis of the light to be reflected from the multiplexer. Pumping light is admitted into the multiplexer at an angle of no more than 22.5 degrees.

REFERENCES:
patent: 4701010 (1987-10-01), Roberts
patent: 5140466 (1992-08-01), Parker
patent: 5191467 (1993-03-01), Kapany et al.
patent: 5299056 (1994-03-01), Kurata et al.
Naganuma et al, "Optical Module with Flat Wavelength Characteristics for Er-Doped Fiber Amplifiers", Optical Amplifiers and Their Applications, Jul., 1993, 1993 Technical Digest Series, vol. 14, pp. 234-237.
Kakinuma et al, "Er-Doped Fiber Amplifier", pp. 85-90.

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