Numerical Demonstration of Wavelength-Insensitive Tuning Characteristics of Ladder-Type Tunable Filter for a Widely Tunable Laser Diode
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概要
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We propose a wavelength-insensitive tunable ladder-type interferometric filter having a novel configuration for use in a widely tunable laser diode. The spectral characteristics of the proposed device are numerically analyzed and compared with those of our previously reported device regarding transmittance and bandwidth. Wavelength-insensitive tuning and flat-topped filter spectra are obtained by optimizing device parameters. We also discuss the applicability of the proposed ladder filter to a widely tunable laser. The proposed tunable laser has a nearly constant threshold current density with tuning current injection. The oscillation frequency of the laser diode can be stabilized by introducing chirping into the ladder filter to obtain a single passband response. These high-performance spectral characteristics make the proposed device feasible for wavelength-division-multiplexing-based systems.
- 2006-05-15
著者
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Kakitsuka Takaaki
Ntt Photonics Laboratories
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Yoshikuni Yuzo
Ntt Photonics Laboratories
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Matsuo Shinji
Ntt Photonics Laboratories
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Suzuki Hiroyuki
Ntt Photonics Laboratories Ntt Corporation
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Jeong Seok-hwan
Ntt Photonics Laboratories Ntt Corporation
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Jeong Seok-Hwan
NTT Photonics Laboratories, NTT Corporation, 3-1, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Matsuo Shinji
NTT Photonics Laboratories, NTT Corporation, 3-1, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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