Liquid crystal ferroelectric electro-optical phase modulators wh

Details Liquid crystal ferroelectric electro-optical phase modulators wh Liquid crystal ferroelectric electro-optical phase modulators wh

1996-12-23

1999-05-25

Palmer, Phan T. H.

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 2, 385 1, 385 15, 349133, 349172, 349196, G02F 1035

Patent

active

059076453

ABSTRACT:
The modulator is formed by a smectic chiral ferroelectric C* liquid crystal cell (CL), crossed by the light signal which is transmitted by the said fibre. The cell (CL) is provided with transparent walls and transparent command electrodes (5 to 7). The liquid crystal (CL), used in half-wave mode, is of the SSFLC (surface stabilized ferroelectric liquid crystal) type, having a wide tile angle .theta., which is as close as possible to 45.degree., in such a way that the said modulator is insensitive to polarisation. The modulator may be connected to two parallel fibres (A2, A3; B2, B3), pertaining to the intermediary part of a Mach-Zehnder coupler between the two 3 dB couplers, and when it is provided in order to modulate the light signal transmitted by either one of the two fibres.

REFERENCES:
patent: 4995705 (1991-02-01), Yoshinaga et al.
patent: 5151808 (1992-09-01), Yamazaki et al.
Copy of Rapport DE Recherche Preliminaire. Oct. 4, 1996.
M.J. O'Callagham, et al, 2412 Optics Letter 16 (1991) May 15, No. 10, New York, NY, US; Diffractive ferroelectric liquid-crystal shutters for unpolarized light; pp. 770-772.
S.P. Fang, et al., 2412 Optics Letters 19 (1994) Aug. 15, No. 16, Washington, US; High-performance single-mode fiber-optic switch; pp. 1204-1206.
Patent Abstracts of Japan; Kawachi, Masao, Publication No. JP57027234, Publication Date, Feb. 13, 1982; Application No. JP800102446; Application Date Jul. 7, 1980; 1 page.

Affiliated with

Also associated with

Rating

Liquid crystal ferroelectric electro-optical phase modulators wh does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal ferroelectric electro-optical phase modulators wh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal ferroelectric electro-optical phase modulators wh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-406527