Wavelength Stabilization Technique Using Dithering-Induced AM Cancellation for DWDM Systems (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
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概要
- 論文の詳細を見る
We proposed and demonstrated a novel wave-length stabilization technique for dense wavelength division multiplexing (DWDM) systems using dithering-induced AM cancellation which improves both wavelength stability and data transmission performance. Our wavelength stabilization technique consists of an optical frequency discriminating function and a function for canceling AM components induced by frequency dithering of the light source. The frequency discrimination in this technique is based on an FM-AM conversion effect, obtained by interaction from frequency dithering of the light with the band-pass characteristic of an arrayed-waveguide grating (AWG) multiplexer. The AM cancellation function was added to suppress optical frequency discriminating errors occurring due to AM components induced by frequency dithering in this wavelength stabilization architecture. In this scheme, an electro-absorption (EA) modulator is employed not only for modulating high-speed data traffic but also for suppressing AM components induced by frequency dithering on the light signal. Since the EA modulator is usually used for modulating high-speed data traffic, dedicated optical devices are not required for suppressing the AM components. The wavelength stability of a light source can therefore be enhanced with simple architecture. In the demonstration, a reduction of fluctuations within 50 MHz versus changes in the modulation index, and long-term stability within 320 MHz after more than 60 hours was achieved in 10 Gbit/s NRZ transmission. We also confirmed that the proposed AM cancellation technique effectively reduces the transmission penalties due to frequency dithering in 10 Gbit/s NRZ data transmission performance.
- 社団法人電子情報通信学会の論文
- 2001-05-01
著者
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Yamamoto Shu
Kdd R&d Laboratories Inc.
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Suzuki M
Nagoya Univ. Nagoya‐shi Jpn
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Suzuki M
Ntt Basic Research Laboratories Nippon Telegraph And Telephone Corporation
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Yamamoto S
Kddi R&d Laboratories Inc.
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SUZUKI Masatoshi
KDDI R&D Laboratories Inc.
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HORIUCHI Yukio
KDDI R&D Laboratories, Inc.
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YAMAMOTO Shu
KDDI R&D Laboratories, Inc.
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Horiuchi Yukio
Kddi R&d Laboratories Inc.
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Suzuki Masatoshi
Kddi R & D Laboratories
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Suzuki Masatoshi
Kdd R&d Laboratories Inc.
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