Wednesday, 21 September, 2011
09:00 -- 10:45
Room A

We.7.A • Signal Generation & Detection

Chair: Paulo Monteiro, Nokia Siemens Networks, Portugal
We.7.A.1 • 09:00 (Invited)
Monolithic Polarization-Diverse Receivers
Christopher R. Doerr1; 1Bell Labs, Alcatel-Lucent, USA.
Polarization independence has traditionally been difficult for photonic integrated circuit (PIC) receivers. However, with advanced modulation formats, receivers often require polarization diversity rather than independence, resulting in new designs for which high-index PICs are well suited.
We.7.A.2 • 09:30
Nonlinear Generation of Ultra-flat broadened Spectrum Based on Adaptive Pulse Shaping
Xin Yang1, David Richardson1, Periklis Petropoulos1; 1Optoelectronics Research Centre, University of Southampton, United Kingdom.
We report a technique to nonlinearly generate precise spectral shapes in an adaptable and power-efficient fashion. The generation of a spectrum with a 7-nm 0.5-dB bandwidth is demonstrated to prove the validity of the approach.
We.7.A.3 • 09:45
Electronic Dispersion Pre-compensation using a Directly Modulated Laser at 10.7-Gb/s
Abdullah S. Karar1, Mauricio Yanez1, Ying Jiang1, John C. Cartledge1, James Harley2, Kim Roberts2; 1Electrical and Computer Engineering, Queen's University, Canada; 2Ciena Corporation, Canada.
A novel electronic dispersion pre-compensation scheme for a directly modulated laser at 10.7-Gb/s is described and experimentally demonstrated for 202 km transmission with a required OSNR of 20.3 dB at a bit error ratio of 1e-3.
We.7.A.4 • 10:00
Generation of Optical Quadrature Duobinary Format Using Optical Delay Interferometer
Shaoliang Zhang1, Fatih Yaman1, Lei Xu1, Yin Shao1, Ting Wang1; 1NEC Labs America, USA.
Novel approach to generate optical quadrature duobinary (QDB) signals is experimentally achieved using single optical delay interferometer, which can simultaneously convert multiple WDM QPSK channels into optical QDB format, enabling better filtering tolerance and high scalability.
We.7.A.5 • 10:15
Pulse Shaping for 112 Gbit/s Polarization Multiplexed 16-QAM Signals Using a 21 GSa/s DAC
John C. Cartledge1, John D. Downie2, Jason Hurley2, Abdullah S. Karar1, Ying Jiang1, Kim Roberts3; 1Electrical and Computer Engineering, Queen's University, Canada; 2Corning Incorporated, USA; 3Ciena, Canada.
The implications of increasing the symbol rate for a given digital-to-analog converter (DAC) sampling rate are investigated by considering the generation of 112 Gbit/s PM 16-QAM signals (14 Gsym/s) using a 21 GSa/s DAC with 6-bit resolution.
We.7.A.6 • 10:30
In-band FSK Supervisory Signaling between Adaptive Optical Transceivers Employing Digital Signal Processing
Takahito Tanimura1, Takeshi Hoshida2, Hisao Nakashima2, Yuichi Akiyama2, Meng Yan3, Zhenning Tao3, Jens C. Rasmussen2; 1Fujitsu Laboratories Ltd., Japan; 2Fujitsu Limited, Japan; 3Fujitsu R&D Center, China.
Digital-domain modulation and demodulation of FSK supervisory signal are demonstrated on 28Gbaud 16QAM/QPSK adaptive transceivers. Unlike conventional AM pilot-tone approach, it requires no additional hardware and is immune to cross-gain modulation.