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Your search keyword '"Higuma, K."' showing total 6 results
Start Over Author "Higuma, K." Journal electronics letters (institution of engineering & technology)
6 results on '"Higuma, K."'

1. 16-level quadrature amplitude modulation by monolithic quad-parallel Mach-Zehnder optical modulator.

Author

Chiba, A., Sakamoto, T., Kawanishi, T., Higuma, K., Sudo, M., and Ichikawa, J.

Subjects
ELECTRONIC modulation, DATA transmission systems, BROADBAND communication systems, AMPLITUDE modulation, DIGITAL communications
Abstract

A monolithically-integrated quad-parallel Mach-Zehnder optical modulator has been fabricated. 3 and 6 dB electro-optical bandwidths of Mach-Zehnder structures embedded in the modulator were evaluated as 22 and 36 GHz, respectively. By using the monolithic optical modulator, a 10 Gbaud 16-level quadrature amplitude modulation (QAM) signal was successfully obtained. [ABSTRACT FROM AUTHOR]

Published
2010
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3. LiNbO3 high-speed optical FSK modulator.

Author

Kawanishi, T., Higuma, K., Fujita, T., Ichikawa, J., Sakamoto, T., Shinada, S., and M. Izutsu

Subjects
*ELECTRONIC modulators, *SWITCHING theory, *OPTOELECTRONICS, *DEMODULATION
Abstract

An optical frequency-shift-keying (FSK) modulator with a pair of Mach-Zehnder structures that can switch optical frequency is developed. The operation is demonstrated at a 10 Gbit/s FSK transmission conducted on a standard singlemode fibre of 60 km, where the FSK signal is demodulated by a fibre Bragg grating. [ABSTRACT FROM AUTHOR]

Published
2004
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