Optical matrix switch

Details Optical matrix switch Optical matrix switch

1988-02-08

1989-04-18

Sikes, William L.

350 9612, 350 9614, G02B 610

Patent

active

048221244

ABSTRACT:
An optical matrix switch comprises 1.times.M/2 optical switch means of N in number, optical switch groups of N/2 in number, and N/2.times.1 optical switch means of M in number, where N is a number of inputs, and M is a number of outputs. Each of the 1.times.M/2 optical switch means includes a predetermined number of optical switch elements each having a function to switch an optical signal between inputs and outputs in accordance with an applied electric field, and has one input and outputs of M/2 in number. The predetermined number is decided dependent on an equation of log.sub.2 M/2. Each of the optical switch groups includes optical switch elements of M/2 in number arranged transversely, and each of the N/2.times.1 optical switch means includes a predetermined number of optical switch elements. The predetermined number is decided dependent on an equation of log.sub.2 N/2. A longitudinal length of the optical matrix switch is approximately (log.sub.2 M/2+1+log.sub.2 N/2 times a length of an optical switch element. Therefore, the optical matrix switch is made smaller in the longitudinal direction.

REFERENCES:
patent: 4473271 (1984-09-01), Mitchell
patent: 4681210 (1986-10-01), Kondo
patent: 4681397 (1987-07-01), Bhatt
patent: 4693547 (1987-09-01), Soref et al.
MacDonald, J. of Lightwave Technology, vol. LT-5, No. 6, Jun. 1987, "Switched Optical Delay-Line Signal Processors," pp. 856-860.
Polky et al., Applied Optics, vol. 21, No. 19, Oct. 1, 1982, "Optical Waveguide Circuit Design of an Adaptive Filter in the Residue Number System", pp. 3539-3550.
Soref, Applied Optics, vol. 21, No. 8, Apr. 15, 1982, "Electrooptic 4.times.4 Matrix Switch for Multimode Fiber-Optic Systems," pp. 1386-1393.
T. Shimoe et al., "Path-Independent Insertion Loss Optical Space Switch," Optical Fiber Communication Conference Technical Digest WB2, 1/2/87.

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