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EP0305995A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

An optical amplifying repeater

Assignee: NEC Corp
•
Filing: 1988-08-31
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Granted: —
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Expires: 2008-08-31
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Abstract

Abstract In an optical amplifying repeater (10), an input signal light which is propagated through a first transmission optical fiber (61) is divided by an optical divider (11) into a plurality of signal lights. Each of the signal lights is amplified in a corresponding optical amplifier (21, 22) among a plurality of optical amplifiers. The signal lights thus amplified are combined in an optical coupler (12) to supply a second transmission optical fiber (62) with a combined signal light. At least one of the optical amplifiers (21, 22) are controlled in its amplification gain so that a level of the combined signal light is held to be a predetermined value.

Inventors

  • 👤 Yasuhiro Aoki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 12:14
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/293; H04B10/2931; H01; H01S; H01S5/00; H01S5/50; H01S5/5009; H01S5/5018; H04B10/2912; H04B10/2914; H01S5/06; H01S5/068; H01S5/0683

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 134 words
An optical amplifying repeater comprising, an optical dividing means for dividing an input signal light propagated through a first transmission optical fiber into signal lights of a predetermined number, optical amplifiers of said predetermined number, each of said optical amplifiers amplifying a corresponding one of said signal lights to provide an amplified signal light, an optical combining means for combining said amplified signal lights from said optical amplifiers to supply a second transmission optical fiber with a combined signal light, a monitor means for the monitor of a level of said combined signal light to produce a monitor signal, and a control means for controlling an amplification gain of at least one optical amplifier among said optical amplifiers in response to said monitor signal whereby said level is held to be a predetermined value.
Claim 2
Dependent Claim 134 words
An optical amplifying repeater comprising, an optical dividing means for dividing an input signal light propagated through a first transmission optical fiber into signal lights of a predetermined number, optical amplifiers of said predetermined number, each of said optical amplifiers amplifying a corresponding one of said signal lights to provide an amplified signal light, an optical combining means for combining said amplified signal lights from said optical amplifiers to supply a second transmission optical fiber with a combined signal light, a monitor means for the monitor of a level of said combined signal light to produce a monitor signal, and a control means for controlling an amplification gain of at least one optical amplifier among said optical amplifiers in response to said monitor signal whereby said level is held to be a predetermined value.
Claim 3
Dependent Claim 77 words
An optical amplifying repeater according to claim 1, Wherein each of said optical amplifiers includes a polarization splitter for dividing a corresponding one of said signal lights of said predetermined number into polarization components of TE and TM waves, a plurality of optical semiconductor laser amplifying elements each amplifying a corresponding signal light of said polarization components independently, and a polarization coupler for combining amplified signal lights supplied from said plurality of optical semiconductor laser amplifying elements.

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