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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24962–24968

Field trial of automatic bias control scheme for optical IQ modulator and demodulator with directly detected 112 Gb/s DQPSK Signal

Hwan Seok Chung, Sun Hyok Chang, Jong Hyun Lee, and Kwangjoon Kim  »View Author Affiliations


Optics Express, Vol. 21, Issue 21, pp. 24962-24968 (2013)
http://dx.doi.org/10.1364/OE.21.024962


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Abstract

When optical transceivers employing in-phase and quadrature (IQ) modulators and demodulator are used in real transmission systems, it is very important to search optimum bias points and to prevent bias drift from their optimal points due to of temperature variation, stress, or device aging. We demonstrate a simple and cost-effective automatic bias control scheme for optical IQ modulator and demodulator based on RF power and peak voltage detection. The principle of control scheme and effects of bias voltage on monitoring parameters are presented. The dynamic performance of the control scheme, effects of optical signal-to-noise ratio (OSNR) of signal, and effects of temperature variation are also evaluated. For the evaluation of bias control scheme at real-environment, we implement the automatic bias control scheme in 112 Gb/s dual carrier-differential QPSK (DC-DQPSK) transceiver, and investigate its long-term stability performances in a field transmission experiment over 797-km of installed fiber and ROADM.

© 2013 Optical Society of America

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(060.5060) Fiber optics and optical communications : Phase modulation

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 8, 2013
Revised Manuscript: August 27, 2013
Manuscript Accepted: September 28, 2013
Published: October 11, 2013

Citation
Hwan Seok Chung, Sun Hyok Chang, Jong Hyun Lee, and Kwangjoon Kim, "Field trial of automatic bias control scheme for optical IQ modulator and demodulator with directly detected 112 Gb/s DQPSK Signal," Opt. Express 21, 24962-24968 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-21-24962


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References

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