Traveling wave optical modulator

Details Traveling wave optical modulator Traveling wave optical modulator

1991-08-14

1992-08-11

Howell, Janice A.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

385 2, 385 3, G02B 610

Patent

active

051384809

ABSTRACT:
A traveling wave optical modulator on X-cut lithium niobate is disclosed which has improved bandwidth capability along with a low switching voltage requirement and good impedance matching. In accordance with another aspect of the disclosed invention, the impedance of a traveling wave optical modulator may be increased to a desired input impedance without adversely affecting the drive voltage or velocity matching of the modulator. This is accomplished by reducing the width of the ground electrodes to not more than 3 times the width of the hot electrode.

REFERENCES:
patent: 4266850 (1981-05-01), Burns
patent: 5004313 (1991-07-01), Ty Tan et al.
patent: 5042895 (1991-08-01), Chouinard et al.
patent: 5061030 (1991-10-01), Miyamoto et al.
patent: 5088097 (1992-02-01), Ono et al.
M. Seino et al., "33-CHz.cm Braodband Ti:LiNbO.sub.3 Mach-Zehnder Modulator," ECOC '89, Gothenburg, Sweden, pp. 433-436 (1989).
K. Kawano et al., "High-Speed and Low Driving Power Ti:LiNbO.sub.3 Mach-Zehnder Optical Modulator at 1.5 .mu.m Wavelength," LEOS '88, Santa Clara, California, p. 96 (1988).
R. Jungerman et al., "Development of an Optical Modulator for a High-Speed Lightwave Component Analyzer", Hewlett-Packard Journal, Feb. 1991, pp. 41-45.
K. Kawano et al., "New Traveling-Wave Electrode Mach-Zehnder Optical Modulator with 20 GHz Bandwidth and 4-7V Driving Voltage at 1-52um", Electronics Letters, 28 Sep. 1989, vol. 25, No. 20, pp. 1382-1383.

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