Optical bypass switch

Details Optical bypass switch Optical bypass switch

1981-11-19

1984-10-23

Arnold, Bruce Y.

350337, 350347E, G02F 1133

Patent

active

044784945

ABSTRACT:
The 2.times.2 bypass switch utilizes a single polarizing beam splitter and a 90.degree. polarization twist layer of liquid crystal held between two right angle prisms. The outer surfaces of the prisms provide a series of total internal reflections to direct light about the switch so that a single polarizing beam splitter may be employed to divide an incident beam into two counter-rotating orthogonally polarized beams and to recombine the beam at the switch selective output port. A compound switch is realized by double folding the optical path in two parallel planes in one embodiment and along parallel paths in the incident plane in another embodiment.

REFERENCES:
patent: 4011543 (1977-03-01), Soref et al.
patent: 4201442 (1980-05-01), McMahon et al.
patent: 4278327 (1981-07-01), McMahon et al.
patent: 4385799 (1983-05-01), Soref
Wagner, R. E., et al., "Electrically Controlled Optical Switch for Multimode Fiber Applications", Applied Optics, vol. 19, No. 17, pp. 2921-2925.

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