## Silica-based PLC with heterogeneously-integrated PDs for one-chip DP-QPSK receiver |

Optics Express, Vol. 20, Issue 26, pp. B264-B269 (2012)

http://dx.doi.org/10.1364/OE.20.00B264

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### Abstract

To realize a DP-QPSK receiver PLC, we heterogeneously integrated eight high-speed PDs on a silica-based PLC platform with a PBS, 90-degree optical hybrids and a VOA. The use of a 2.5%-Δ waveguide reduced the receiver PLC size to 11 mm x 11 mm. We successfully demonstrated 32 Gbaud DP-QPSK signal demodulation with the receiver PLC.

© 2012 OSA

## 1. Introduction

2. K. Murata, T. Saida, K. Sano, I. Ogawa, H. Fukuyama, R. Kasahara, Y. Muramoto, H. Nosaka, S. Tsunashima, T. Mizuno, H. Tanobe, K. Hattori, T. Yoshimatsu, H. Kawakami, and E. Yoshida, “100-Gbit/s PDM-QPSK coherent receiver with wide dynamic range and excellent common-mode rejection ratio,” Opt. Express **19**(26), B125–B130 (2011). [CrossRef] [PubMed]

5. T. Ohyama, I. Ogawa, H. Tanobe, R. Kasahara, S. Tsunashima, T. Yoshimatsu, H. Fukuyama, T. Itoh, Y. Sakamaki, Y. Muramoto, H. Kawakami, M. Ishikawa, S. Mino, and K. Murata, “All-in-one 100-Gbit/s DP-QPSK coherent receiver using novel PLC-based integration structure with low-loss and wide-tolerance multi-channel optical coupling,” in OECC 2010, PD6.

6. J. Wang, M. Kroh, A. Theurer, C. Zawadzki, D. Schmidt, R. Ludwig, M. Lauermann, Z. Zhang, A. Beling, A. Matiss, C. Schubert, A. Steffan, N. Keil, and N. Grote, “Dual-quadrature coherent receiver for 100G Ethernet applications based on polymer planar lightwave circuit,” Opt. Express **19**(26), B166–B172 (2011). [CrossRef] [PubMed]

8. Y. Nasu, T. Mizuno, R. Kasahara, and T. Saida, “Temperature insensitive and ultra wideband silica-based dual polarization optical hybrid for coherent receiver with highly symmetrical interferometer design,” Opt. Express **19**(26), B112–B118 (2011). [CrossRef] [PubMed]

5. T. Ohyama, I. Ogawa, H. Tanobe, R. Kasahara, S. Tsunashima, T. Yoshimatsu, H. Fukuyama, T. Itoh, Y. Sakamaki, Y. Muramoto, H. Kawakami, M. Ishikawa, S. Mino, and K. Murata, “All-in-one 100-Gbit/s DP-QPSK coherent receiver using novel PLC-based integration structure with low-loss and wide-tolerance multi-channel optical coupling,” in OECC 2010, PD6.

## 2. Design and fabrication

8. Y. Nasu, T. Mizuno, R. Kasahara, and T. Saida, “Temperature insensitive and ultra wideband silica-based dual polarization optical hybrid for coherent receiver with highly symmetrical interferometer design,” Opt. Express **19**(26), B112–B118 (2011). [CrossRef] [PubMed]

8. Y. Nasu, T. Mizuno, R. Kasahara, and T. Saida, “Temperature insensitive and ultra wideband silica-based dual polarization optical hybrid for coherent receiver with highly symmetrical interferometer design,” Opt. Express **19**(26), B112–B118 (2011). [CrossRef] [PubMed]

## 3. Characteristics

10. T. Yoshimatsu, Y. Muramoto, S. Kodama, T. Furuta, N. Shigekawa, H. Yokoyama, and T. Ishibashi, “Suppression of space charge effect in MIC-PD using composite field structure,” Electron. Lett. **46**(13), 941–943 (2010). [CrossRef]

## 4. Demonstration of 32 Gbaud DP-QPSK demodulation

^{15}-1. The signal power was set at −3 dBm and the local oscillator power was set at + 16 dBm. A clear constellation was successfully obtained by off-line digital signal processing, as shown in Fig. 6(b). Then, a Q value of around 9.1 dB was confirmed at an OSNR of 16 dB. These results indicate that eight PDs with uniform characteristics and optical passives with excellent polarization and phase controllability were integrated in the receiver PLC.

## 4. Conclusion

## Acknowledgments

## References and links

1. | A. Beling, N. Ebel, A. Matiss, G. Unterbörsch, M. Nölle, J. K. Fischer, J. Hilt, L. Molle, C. Schubert, F. Verluise, and L. Fulop, “Fully-integrated polarization-diversity coherent receiver module for 100G DP-QPSK,” in OSA/OFC/NFOEC 2011, OML5 (2011). |

2. | K. Murata, T. Saida, K. Sano, I. Ogawa, H. Fukuyama, R. Kasahara, Y. Muramoto, H. Nosaka, S. Tsunashima, T. Mizuno, H. Tanobe, K. Hattori, T. Yoshimatsu, H. Kawakami, and E. Yoshida, “100-Gbit/s PDM-QPSK coherent receiver with wide dynamic range and excellent common-mode rejection ratio,” Opt. Express |

3. | R. Kunkel, H.-G. Bach, D. Hoffmann, C.M. Weinert, I. Molina-Fernandez, and R. Halir, “First monolithic InP-based 90°-hybrid OEIC comprising balanced detectors for 100GE coherent frontends,” in IPRM 2009, TuB2.2. |

4. | C. R. Doerr, P. J. Winzer, S. Chandrasekhar, M. Rasras, M. Earnshaw, J. Weiner, D. M. Gill, and Y. K. Chen, “Monolithic silicon coherent receiver,” in OFC/NFOEC 2009, PDPB2. |

5. | T. Ohyama, I. Ogawa, H. Tanobe, R. Kasahara, S. Tsunashima, T. Yoshimatsu, H. Fukuyama, T. Itoh, Y. Sakamaki, Y. Muramoto, H. Kawakami, M. Ishikawa, S. Mino, and K. Murata, “All-in-one 100-Gbit/s DP-QPSK coherent receiver using novel PLC-based integration structure with low-loss and wide-tolerance multi-channel optical coupling,” in OECC 2010, PD6. |

6. | J. Wang, M. Kroh, A. Theurer, C. Zawadzki, D. Schmidt, R. Ludwig, M. Lauermann, Z. Zhang, A. Beling, A. Matiss, C. Schubert, A. Steffan, N. Keil, and N. Grote, “Dual-quadrature coherent receiver for 100G Ethernet applications based on polymer planar lightwave circuit,” Opt. Express |

7. | T. Inoue and K. Nara, “Ultrasmall PBS-integrated coherent mixer using 1.8%-delta silica-based planar lightwave circuit,” in ECOC 2010. Mo.2.F.4. (2010). |

8. | Y. Nasu, T. Mizuno, R. Kasahara, and T. Saida, “Temperature insensitive and ultra wideband silica-based dual polarization optical hybrid for coherent receiver with highly symmetrical interferometer design,” Opt. Express |

9. | Y. Kurata, Y. Nasu, M. Tamura, H. Yokoyama, and Y. Muramoto, “Heterogeneous integration of high-speed InP PDs on silica-based planar lightwave circuit platform,” in ECOC 2011, Th.12.LeSaleve.5. |

10. | T. Yoshimatsu, Y. Muramoto, S. Kodama, T. Furuta, N. Shigekawa, H. Yokoyama, and T. Ishibashi, “Suppression of space charge effect in MIC-PD using composite field structure,” Electron. Lett. |

**OCIS Codes**

(130.0250) Integrated optics : Optoelectronics

(230.5170) Optical devices : Photodiodes

(130.2755) Integrated optics : Glass waveguides

**ToC Category:**

Waveguide and Optoelectronic Devices

**History**

Original Manuscript: October 1, 2012

Manuscript Accepted: November 11, 2012

Published: November 29, 2012

**Virtual Issues**

European Conference on Optical Communication 2012 (2012) *Optics Express*

**Citation**

Yu Kurata, Yusuke Nasu, Munehisa Tamura, Ryoichi Kasahara, Shinichi Aozasa, Takayuki Mizuno, Haruki Yokoyama, Satoshi Tsunashima, and Yoshifumi Muramoto, "Silica-based PLC with heterogeneously-integrated PDs for one-chip DP-QPSK receiver," Opt. Express **20**, B264-B269 (2012)

http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-26-B264

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### References

- A. Beling, N. Ebel, A. Matiss, G. Unterbörsch, M. Nölle, J. K. Fischer, J. Hilt, L. Molle, C. Schubert, F. Verluise, and L. Fulop, “Fully-integrated polarization-diversity coherent receiver module for 100G DP-QPSK,” in OSA/OFC/NFOEC 2011, OML5 (2011).
- K. Murata, T. Saida, K. Sano, I. Ogawa, H. Fukuyama, R. Kasahara, Y. Muramoto, H. Nosaka, S. Tsunashima, T. Mizuno, H. Tanobe, K. Hattori, T. Yoshimatsu, H. Kawakami, and E. Yoshida, “100-Gbit/s PDM-QPSK coherent receiver with wide dynamic range and excellent common-mode rejection ratio,” Opt. Express19(26), B125–B130 (2011). [CrossRef] [PubMed]
- R. Kunkel, H.-G. Bach, D. Hoffmann, C.M. Weinert, I. Molina-Fernandez, and R. Halir, “First monolithic InP-based 90°-hybrid OEIC comprising balanced detectors for 100GE coherent frontends,” in IPRM 2009, TuB2.2.
- C. R. Doerr, P. J. Winzer, S. Chandrasekhar, M. Rasras, M. Earnshaw, J. Weiner, D. M. Gill, and Y. K. Chen, “Monolithic silicon coherent receiver,” in OFC/NFOEC 2009, PDPB2.
- T. Ohyama, I. Ogawa, H. Tanobe, R. Kasahara, S. Tsunashima, T. Yoshimatsu, H. Fukuyama, T. Itoh, Y. Sakamaki, Y. Muramoto, H. Kawakami, M. Ishikawa, S. Mino, and K. Murata, “All-in-one 100-Gbit/s DP-QPSK coherent receiver using novel PLC-based integration structure with low-loss and wide-tolerance multi-channel optical coupling,” in OECC 2010, PD6.
- J. Wang, M. Kroh, A. Theurer, C. Zawadzki, D. Schmidt, R. Ludwig, M. Lauermann, Z. Zhang, A. Beling, A. Matiss, C. Schubert, A. Steffan, N. Keil, and N. Grote, “Dual-quadrature coherent receiver for 100G Ethernet applications based on polymer planar lightwave circuit,” Opt. Express19(26), B166–B172 (2011). [CrossRef] [PubMed]
- T. Inoue and K. Nara, “Ultrasmall PBS-integrated coherent mixer using 1.8%-delta silica-based planar lightwave circuit,” in ECOC 2010. Mo.2.F.4. (2010).
- Y. Nasu, T. Mizuno, R. Kasahara, and T. Saida, “Temperature insensitive and ultra wideband silica-based dual polarization optical hybrid for coherent receiver with highly symmetrical interferometer design,” Opt. Express19(26), B112–B118 (2011). [CrossRef] [PubMed]
- Y. Kurata, Y. Nasu, M. Tamura, H. Yokoyama, and Y. Muramoto, “Heterogeneous integration of high-speed InP PDs on silica-based planar lightwave circuit platform,” in ECOC 2011, Th.12.LeSaleve.5.
- T. Yoshimatsu, Y. Muramoto, S. Kodama, T. Furuta, N. Shigekawa, H. Yokoyama, and T. Ishibashi, “Suppression of space charge effect in MIC-PD using composite field structure,” Electron. Lett.46(13), 941–943 (2010). [CrossRef]

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