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2008年02月20日

【期刊论文】PolSK Label Over VSB-CSRZ Payload Scheme in AOLS Network

陈宏伟, Hongwei Chen, Minghua Chen, , and Shizhong Xie

JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 25, NO. 6, JUNE 2007,-0001,():

-1年11月30日

摘要

A novel orthogonal modulation scheme of polarization-shift-keying label over vestigial sideband payload is proposed and experimentally demonstrated over a 43-Gb/s alloptical- label-switching transmission. With this scheme, a high extinction ratio of the label is reached, while a spectral efficiency of 0.8 b/s/Hz is achieved by weakening the imperfection of the high-speed pulse sequence in polarization modulation. Furthermore, this modulation scheme is relatively irrelevant with payload bit rate. The payload and label penalties after 80-km NZDSF fiber transmission and label erasure are 1.5 and 1 dB, respectively. The influence of filter center frequency offset is also investigated. Besides, a label rewriting method is introduced to simplify label processing in intermedia nodes. All these results show that this scheme can be a candidate technique for the next-generation optical network.

All-optical label switching (, AOLS), , label rewriting, polarization shift keying (, PolSK), , vestigial sideband (, VSB), -carrier suppressed return-to-zero (, CSRZ),

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2008年02月20日

【期刊论文】A Novel Composite Method for Ultra-Wideband Doublet Pulses Generation

陈宏伟, Hongwei Chen, Member, IEEE, Minghua Chen, Ciyuan Qiu, and Shizhong Xie, Senior Member

IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 19, NO. 24, DECEMBER 15, 2007 2021,-0001,():

-1年11月30日

摘要

A novel composite approach to generate ultra-wideband (UWB) doublet pulses in optical domain through an electrical Gaussian pulse is proposed and demonstrated in this letter. Two pulses with reversed polarity generated by polarization modulation are fed into a differential group delay device and a semiconductor optical amplifier (SOA) wherein the optical pulse profile is modified. Doublet pulses are obtained after optical–electrical detection due to gain saturation and recovery mechanism in the SOA. The fractional bandwidth of doublet pulses exceeds 180%, fulfilling the UWB requirements.

Doublet pulse, polarization modulation, semiconductor optical amplifier (, SOA), , ultra-wideband (, UWB),

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2008年02月20日

【期刊论文】Optical labeling scheme using polarization shift keying/vestigial sideband carriersuppressed return-to-zero orthogonal modulation

陈宏伟, Hongwei Chen, Minghua Chen, Shizhong Xie, and Bingkun Zhou

May 1, 2006, Vol. 31, No. 9, OPTICS LETTERS 1187 0146-9592,-0001,():

-1年11月30日

摘要

We propose and experimentally demonstrate a polarization shift keying label and a vestigial sideband carrier-suppressed return-to-zero payload scheme for a 43 Gbit/s all-optical label switching network. This scheme has a narrow channel bandwidth and a low penalty due to polarization mode dispersion impairments, which confirm it as a candidate technique for the next generation of optical networks.

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2008年02月20日

【期刊论文】All optical labeling scheme with vestigial sideband payload

陈宏伟, Hongwei Chen, Minghua Chen, Yitang Dai, Shizhong Xie and Bingkun Zhou

4 April 2005/Vol. 13, No. 7/OPTICS EXPRESS 2282,-0001,():

-1年11月30日

摘要

A novel scheme based on 40Gb/s vestigial sideband modulation for optical payload and label multiplex and separation in all optical label switching (AOLS) networks is firstly proposed and experimentally demonstrated. The payload is combined and separated with wavelength labels by optical filters. The experiment results show that after label separation, the power penalties of payload and label are both very little. The influence of the wavelength difference between label and payload is also discussed. The power penalty of payload can be less than 1dB as long as the wavelength difference is larger than 0.1nm. This scheme highly reduces the channel bandwidth of payload and label and is proposing to be used in future optical Internet.

(, 060., 4080), Modulation, (, 060., 4250), Networks, (, 060., 4510), Optical Communications

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2008年02月20日

【期刊论文】Investigation of vestigial sideband carrier suppressed return-to-zero formats due to optical filtering in a 40-Gbit/s system

陈宏伟, Hongwei Chen, MEMBER SPIE, Minghua Chen, Shizhong Xie, and Bingkun Zhou

April 2006/Vol. 45(4),-0001,():

-1年11月30日

摘要

We experimentally investigate the influence of vestigial sideband (VSB) filtering in a 40-Gbit/s optical system. Two kinds of optical filters and different pseudorandom bit sequences (PRBS) are used in experiment. The results show that optical filter ramp and PRBS length will cause different impacts in a VSB carrier suppressed return-to-zero system.

vestigial sideband, pseudorandom bit sequence length, filtering impact

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  • 陈宏伟 邀请

    清华大学,北京

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