TY - JOUR
T1 - Analog and digital optical pulse synthesizers using arrayed-waveguide gratings for high-speed optical signal processing
AU - Tsuda, Hiroyuki
AU - Tanaka, Yosuke
AU - Shioda, Tatsutoshi
AU - Kurokawa, Takashi
N1 - Funding Information:
Manuscript received April 7, 2007; revised November 23, 2007. This work was supported by the Ministry of Public Management, Home Affairs, Posts and Telecommunications, Japan.
PY - 2008/3/15
Y1 - 2008/3/15
N2 - In this paper, analog and digital optical pulse synthesizers using high-resolution arrayed-waveguide gratings (AWG) have been developed. The analog type of optical synthesizer consists of an AWG with an integrated 45°, curved-surfaced mirror, a 4-f lens system, and an optically addressable spatial light modulator. The effective frequency resolution is 14.5 GHz. A dispersion compensation experiment is successfully carried out and a transform-limited short pulse has been obtained. This digital type of optical synthesizer comprises 30 frequency separated channels with a spacing of 12.5 GHz, where each channel includes an amplitude modulator and a phase modulator. The rectangular-shaped pulse is generated with this pulse synthesizer, together with a 12.5-GHz-spacing, optical frequency comb. The synthesizer can generate an optical pulse with any waveform. Moreover, using periodic characteristics of the pulse synthesizer, a 250-GHz repetition rate pulse train was generated, in combination with an ultrawideband, waveguide type of Fabry-Perot electrooptic modulator.
AB - In this paper, analog and digital optical pulse synthesizers using high-resolution arrayed-waveguide gratings (AWG) have been developed. The analog type of optical synthesizer consists of an AWG with an integrated 45°, curved-surfaced mirror, a 4-f lens system, and an optically addressable spatial light modulator. The effective frequency resolution is 14.5 GHz. A dispersion compensation experiment is successfully carried out and a transform-limited short pulse has been obtained. This digital type of optical synthesizer comprises 30 frequency separated channels with a spacing of 12.5 GHz, where each channel includes an amplitude modulator and a phase modulator. The rectangular-shaped pulse is generated with this pulse synthesizer, together with a 12.5-GHz-spacing, optical frequency comb. The synthesizer can generate an optical pulse with any waveform. Moreover, using periodic characteristics of the pulse synthesizer, a 250-GHz repetition rate pulse train was generated, in combination with an ultrawideband, waveguide type of Fabry-Perot electrooptic modulator.
KW - Frequency synthesizers
KW - Optical signal processing
KW - Optical waveguide
KW - Signal generators
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U2 - 10.1109/JLT.2007.916580
DO - 10.1109/JLT.2007.916580
M3 - Article
AN - SCOPUS:42649093834
SN - 0733-8724
VL - 26
SP - 670
EP - 677
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 6
ER -