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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12197–12207

Polarization insensitive 25-Gbaud direct D(Q)PSK receiver based on polymer planar lightwave hybrid integration platform

Jin Wang, Crispin Zawadzki, Nelson Mettbach, Walter Brinker, Ziyang Zhang, Detlef Schmidt, Norbert Keil, Norbert Grote, and Martin Schell  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12197-12207 (2011)

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We report a direct DPSK receiver based on polymer planar lightwave circuit technology, which incorporates a 2x25 GHz photodiode (PD) array hybridly integrated via 45° mirrors. In this direct DPSK receiver, a half-wave plate and heating electrodes are implemented to eliminate the polarization-dependent frequency-shift (PDFS) of the delay-line interferometer (DLI). By applying a proper heating current, a residual PDFS of practically zero at 1550 nm and within ±125 MHz was achieved over the full C-band. Integrated with the PD array, the peak responsivity is ~0.14 A/W for orthogonal polarizations over the C-band. To characterize this direct receiver, we introduce an adapted common-mode rejection ratio (CMRR), which takes into account the unequal responsivities of the PDs, the uneven split of the input power by the DLI, the phase error and the extinction ratio of the DLI. The measured CMRR under DC condition is below −20 dB over the C-band.

© 2011 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(250.5460) Optoelectronics : Polymer waveguides

ToC Category:
Integrated Optics

Original Manuscript: May 19, 2011
Revised Manuscript: June 1, 2011
Manuscript Accepted: June 1, 2011
Published: June 8, 2011

Jin Wang, Crispin Zawadzki, Nelson Mettbach, Walter Brinker, Ziyang Zhang, Detlef Schmidt, Norbert Keil, Norbert Grote, and Martin Schell, "Polarization insensitive 25-Gbaud direct D(Q)PSK receiver based on polymer planar lightwave hybrid integration platform," Opt. Express 19, 12197-12207 (2011)

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