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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 3 — Jan. 20, 1998
  • pp: 496–501

Efficient single-mode GaAs/AlGaAs W waveguide phase modulator with a low propagation loss

Young Tae Byun, Kyung Hyun Park, Sun Ho Kim, Sang Sam Choi, Jong Chang Yi, and Tong Kun Lim  »View Author Affiliations


Applied Optics, Vol. 37, Issue 3, pp. 496-501 (1998)
http://dx.doi.org/10.1364/AO.37.000496


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Abstract

We report a single-mode P-P-p-i-n-N-N GaAs/AlGaAs W waveguide phase modulator with a high phase modulation efficiency and a low propagation loss. The phase modulator with a W-shaped refractive-index profile utilizes a novel epilayer structure to reduce the propagation loss associated with doped layers and to obtain a phase modulation efficiency larger than those of P-i-N double heterostructure modulators. The phase shift and propagation loss were measured with a Fabry–Perot resonance method at 1.31-μm wavelength. A phase modulation efficiency as high as 34.6°/V mm was measured for TE polarized light. Also propagation losses of less than 0.6 dB/cm were achieved. As a result, the W waveguide phase modulator that exhibits a high phase modulation efficiency and a low propagation loss have been experimentally realized for the first time as far as we know.

© 1998 Optical Society of America

OCIS Codes
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(230.7370) Optical devices : Waveguides
(350.5500) Other areas of optics : Propagation

History
Original Manuscript: December 10, 1996
Revised Manuscript: June 25, 1997
Published: January 20, 1998

Citation
Young Tae Byun, Kyung Hyun Park, Sun Ho Kim, Sang Sam Choi, Jong Chang Yi, and Tong Kun Lim, "Efficient single-mode GaAs/AlGaAs W waveguide phase modulator with a low propagation loss," Appl. Opt. 37, 496-501 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-3-496

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