Multipath Interference Test Method for Distributed Amplifiers Using Self-Heterodyne Technique(Optomechatronic Instrumentation,<Special Section>Microoptomechatronics)

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概要

• 論文の詳細を見る

• A method of testing distributed amplifiers is presented; multipath interference (MPI) is detected as a beat spectrum between a multipath signal and a direct signal using a frequency-modulated test signal. A test signal with an approximately 450MHz frequency deviation at an 80kHz modulation frequency is emitted from a directly modulated DFBLD by a pulse stream passing through an equalizer. A receiver consisting of a photodiode and an electrical spectrum analyzer (ESA) detects a baseband power spectrum peak appearing at the frequency of the test signal frequency deviation. MPI is converted from the spectrum peak power using a calibration chart. The test method has decreased the minimum detectable MPI as low as -70dB, compared with that of -50dB of conventional test methods. The detailed design and performance of the proposed method are discussed, including the calibration procedure, computer simulations for evaluating systematic errors caused by the repetition rate of the frequency modulated test signal and the fiber length under test, and experiments on single-mode fibers and distributed Raman amplifiers.

• 社団法人電子情報通信学会の論文
• 2007-01-01

著者

• Okada Takahiro

  Shizuoka University

• Aida Kazuo

  Shizuoka University

• HINAKO Youji

  Shizuoka University

関連論文

• Multipath Interference Test Method for Distributed Amplifiers Using Self-Heterodyne Technique(Optomechatronic Instrumentation,Microoptomechatronics)

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