Two-way repeater employing optical amplification

Details Two-way repeater employing optical amplification Two-way repeater employing optical amplification

1995-07-11

1997-07-29

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359176, 359344, H01S 3091, H04B 1016, G02B 626

Patent

active

056526750

ABSTRACT:
A two-way repeater apparatus for directly amplifying optical signals, to be transmitted in mutually opposite directions, with little distortion by directly exciting laser media. An outward optical signal passes a first set of ports of a first optical circulator, is amplified by an Er ion-doped optical fiber, and further passes a first set of ports of a second optical circulator to become an outward output optical signal. Meanwhile, an inward optical signal passes another set of ports of the second optical circulator, is amplified by another Er ion-doped optical fiber, and further passes another set of ports of the first optical circulator to become an inward output optical signal.

REFERENCES:
patent: 4867518 (1989-09-01), Stamnitz et al.
patent: 4972513 (1990-11-01), Mochizuki et al.
patent: 5136420 (1992-08-01), Inagaki et al.
patent: 5231529 (1993-07-01), Kaeda
Barnard et al, IEEE Photonics Letters, vol. 4, #8, Aug. 1992, pp. 911-913.
Masafumi et al, Conf. Laser Electr. Opt. pp. 424-425, Apr. 24, 1989; Abst. only provided herewith.

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