Optical spectrum control circuit with flat pass band characteristics using a high-resolution arrayed-waveguide grating

Tatsuhiko Ikeda; Takayuki Mizuno; Hiroshi Takahashi; Hiroyuki Tsuda

doi:10.1117/12.2003113

6 March 2013 Optical spectrum control circuit with flat pass band characteristics using a high-resolution arrayed-waveguide grating

Tatsuhiko Ikeda, Takayuki Mizuno, Hiroshi Takahashi, Hiroyuki Tsuda

Author Affiliations +

Proceedings Volume 8627, Integrated Optics: Devices, Materials, and Technologies XVII; 862703 (2013) https://doi.org/10.1117/12.2003113
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

We have proposed an optical spectrum control circuit that realizes various kinds of signal processing in the optical domain using a silica-based planar lightwave circuit including arrayed-waveguide gratings. In order to obtain a flat transmission spectrum required for processing an optical signal that has a continuous spectrum, the number of the spectral output waveguides is set more than the number of waveguides in the waveguide array. In this study, we demonstrated a phase error compensation and obtained the flat transmission spectrum with ripples below 0.9 dB. We also demonstrated a tunable bandwidth operation as an example of the spectral amplitude control and a variable pulse delay operation as an example of the spectral phase control, respectively. In the tunable bandwidth operation, the passband characteristic of the minimum bandwidth of 5-GHz and tunable pass-band characteristics with different center frequencies with about 20-dB extinction ratio were obtained. In the variable delay operation, pulse delays equal to calculated values could be observed with some phase settings.

Citation Download Citation

Tatsuhiko Ikeda, Takayuki Mizuno, Hiroshi Takahashi, and Hiroyuki Tsuda "Optical spectrum control circuit with flat pass band characteristics using a high-resolution arrayed-waveguide grating", Proc. SPIE 8627, Integrated Optics: Devices, Materials, and Technologies XVII, 862703 (6 March 2013); https://doi.org/10.1117/12.2003113

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KEYWORDS

Waveguides

Optical signal processing

Phase shifts

Signal processing

Optical circuits

Geometrical optics

Terahertz radiation

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