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EP0242802A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Optical-wavelength-division multiplex transmission system with an optical filter for spontaneous emission noise

Assignee: NEC Corp
•
Filing: 1987-04-16
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Granted: —
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Expires: 2007-04-16
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Abstract

Abstract The invention relates to an optical wavelength-division multiplex transmission system comprising optical multiplexer means (620) for multiplexing a plurality of optical signals having different wavelengths into a wavelength-division multiplexed signal, optical amplifier means (622, 624) for amplifying said wavelength-division multiplexed signal from said optical multiplexer means (620) and optical filter means (100) disposed between adjacent ones of said optical amplifier means (622, 624) for suppressing undesired spectra of the wavelength-­division multiplexed signal from the optical amplifier means (622, 624).

Inventors

  • 👤 Syuiji c/o NEC Corporation Suzuki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 08:16
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/293; H04B10/2933; H04B10/2935; H04B10/2912; H04B10/2914; H04B10/2916; H04B2210/00; H04B2210/25; H04B2210/258

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 66 words
An optical wavelength-division multiplex transmission system comprising optical multiplexer means for multiplexing a plurality of optical signals having different wavelengths into a wavelength-division multiplexed signal, optical amplifier means for amplifying said wavelength-division multiplexed signal from said optical multiplexer means and optical filter means disposed between adjacent ones of said optical amplifier means for suppressing undesired spectra of the wavelength-division multiplexed signal from the optical amplifier means.
Claim 2
Dependent Claim 66 words
An optical wavelength-division multiplex transmission system comprising optical multiplexer means for multiplexing a plurality of optical signals having different wavelengths into a wavelength-division multiplexed signal, optical amplifier means for amplifying said wavelength-division multiplexed signal from said optical multiplexer means and optical filter means disposed between adjacent ones of said optical amplifier means for suppressing undesired spectra of the wavelength-division multiplexed signal from the optical amplifier means.
Claim 3
Dependent Claim 39 words
The optical wavelength-division multiplex transmission system as claimed in claim l, wherein said optical filter means comprises interferometer means having predetermined pass-bands, said wavelengths of said optical signals corresponding to center wavelengths of said pass-bands of said interferometer means.

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