Optical array module and the control method of the same

Details Optical array module and the control method of the same Optical array module and the control method of the same

1994-11-28

1996-10-22

Lee, John D.

Optical waveguides

With optical coupler

Switch

385 20, 385 24, G02B 635

Patent

active

055685757

ABSTRACT:
In a light emitting array module comprising light emitting elements arranged in an array fashion, the light emitting elements can be used selectively by monitoring drive states of the light emitting elements if necessary. A plurality of light emitting elements arranged in parallel are coupled to an optical fiber array via an optical switch which can switch optical paths of emitted light. Besides, the optical switch is provided with a light receiving element coupled to a remaining output port thereof in addition to the optical fibers. Optical paths of lights emitted from the light emitting elements are switched by the optical switch, and an optical signal is converted into an electric signal by the light receiving element to monitor light emitting states of the light emitting element. Drive state of the corresponding light emitting element is controlled by the electric signals. The deterioration of the light emitting element is checked to detect whether the light emitting element is usable or not, and, if it is unusable, the light emitting element is switched by a spare light emitting element.

REFERENCES:
patent: 4787692 (1988-11-01), Spanke
patent: 4822124 (1989-04-01), Suzuki
patent: 5002355 (1991-03-01), Caron
patent: 5048910 (1991-09-01), Caron
patent: 5241610 (1993-08-01), Labiche et al.
H. Nishinoto et al., "Polarization Independant LiNbO.sub.3 8 X 8 Matrix Switch", IEEE Photonics Technology Letters, vol. 2, No. 9, Sep. 1990, pp. 634-636.

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