Technique for modulating optical signals in optical communicatio

Details Technique for modulating optical signals in optical communicatio Technique for modulating optical signals in optical communicatio

1996-11-18

1998-08-18

Healy, Brian

Optical waveguides

Temporal optical modulation within an optical waveguide

385 2, 385 8, 385 15, 385 16, 385147, 359846, G02F 101, G02B 508

Patent

active

057968802

ABSTRACT:
In an optical transmitter, an input optical fiber delivers an optical signal to a fiber coupling modulator whose reflective surface is transformable in response to the data to be transmitted. In a first state of the modulator corresponding to a first data value, the reflective surface is flat and smooth. The optical signal, which may be a continuous-wave light, is reflected from the surface and efficiently coupled to an output fiber. In a second state of the modulator corresponding to a second data value, the reflective surface is controllably deformed to cause an aberration in reflecting the optical signal. As a result, a much reduced amount of light energy is coupled to the output fiber.

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I. Ladabaum et al., "Micromachined Ultrasonic Transducers: 11.4 MHz Transmission in Air and More," Appl. Phys. Lett., vol. 68, No. 1, Jan. 1996, pp. 7-9.
D. Spoliansky et al., "Micromachined Ultrasonic Air-Transducers (MUTs),"Microelectronic Engineering 30 (1996), pp. 535-538.

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