Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23285
Title: PMD-insensitive cd monitoring based on rf clock power ratio measurement with optical notch filter
Authors: Yang, J
Yu, C
Yang, Y
Cheng, L
Li, Z
Lu, C 
Lau, APT 
Tam, HY 
Wai, PKA 
Keywords: Chromatic dispersion (CD)
Optical fiber communication
Optical performance monitoring
Polarization-mode dispersion (PMD)
Issue Date: 2011
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE photonics technology letters, 2011, v. 23, no. 21, 5982087, p. 1576-1578 How to cite?
Journal: IEEE photonics technology letters 
Abstract: We propose and experimentally demonstrate a chromatic-dispersion (CD) monitoring method based on radio-frequency (RF) clock power ratio measurement in 38-Gb/s nonreturn-to-zero differential quadrature phase-shift keying (NRZ-DQPSK) and 57-Gb/s NRZ differential 8-level phase-shift keying (D8PSK) systems. A narrowband fiber Bragg grating (FBG) notch filter is centered at the optical carrier wavelength, such that the RF clock power decreases with CD. On the other hand, RF clock power increases with CD in the absence of the notch filter. By using the RF power ratio of the filtered and nonfiltered signals, polarization-mode-dispersion (PMD) effects on RF power ratio can be eliminated and CD measurement sensitivity can be increased. The CD monitoring range is 0 ∼ 250 ps/nm in the systems with a symbol rate of 19-Gsym/s. Moreover, the proposed CD-monitoring method is not affected by received optical power.
URI: http://hdl.handle.net/10397/23285
ISSN: 1041-1135
EISSN: 1941-0174
DOI: 10.1109/LPT.2011.2164519
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