Title:
POLARIZED LIGHT SCRAMBLER
Document Type and Number:
Japanese Patent JPH03148641
Kind Code:
A
Abstract:
PURPOSE:To eliminate polarization variation in transmission and to eliminate the need for a polarization controller by splitting input light into two by a polarized light separator and sending those light waves by polarized light maintaining optical fibers. CONSTITUTION:The polarized light separator 1 separates the orthogonal polarized light components of a light wave which is inputted from a light input port 7 and outputs the (P) wave and (S) wave. Then the P wave is inputted to a nonmodulation-side optical path 3a, propagated without any change in its polarized state, and inputted to a polarized light multiplexer 2. The S wave, on the other hand, is propagated in a phase-modulation side optical path 3b, inputted to an optical phase modulator 5 for phase modulation from 0 to pi, and propagated in a phase modulation optical path 3c and inputted to the multiplexer 2. The multiplexer 2 multiplexes the input P and S waves and outputs them to a light output port without any loss. Here, polarized wave maintaining optical fibers are used for the optical paths 3a - 3c and port 7 to preclude polarized wave variation. In this case, an optical amplifier is provided preferably on the optical path 3b, etc.
Inventors:
MAEDA HIDENARI
YAMAZAKI HIROYUKI
YAMAZAKI HIROYUKI
Application Number:
JP28755389A
Publication Date:
June 25, 1991
Filing Date:
November 06, 1989
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
G02F1/03; G02B27/28; G02F1/35; G02F2/00; H04B10/25; H04B10/40; H04B10/50; H04B10/532; H04B10/548; H04B10/60; (IPC1-7): G02B27/28; G02F1/03; G02F1/35; G02F2/00; H04B10/02
Attorney, Agent or Firm:
Toshiaki Suzuki