Clausen, Anders

Jeppesen, Palle

Oxenløwe, Leif Katsuo

Seoane, Jorge

Siahlo, Andrei

Zhenbo, Xu

All optical demultiplexing of a 160 Gbit/s optical time domain multiplexed signal using a co-propagating 10 GHz optical clock as control signal into a nonlinear optical loop mirror is demonstrated

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Downloaded from orbit.dtu.dk on: Dec 17, 2017All optical 160 to 10 Gbit/s demultiplexing using co-propagating optical clockSeoane, Jorge; Siahlo, Andrei; Clausen, Anders; Oxenløwe, Leif Katsuo; Xu, Zhenbo; Jeppesen, PallePublished in:Technical Digest Conference on Lasers and Electro-Optics 2004Publication date:2004Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Seoane, J., Siahlo, A., Clausen, A., Oxenløwe, L. K., Zhenbo, X., & Jeppesen, P. (2004). All optical 160 to 10Gbit/s demultiplexing using co-propagating optical clock. In Technical Digest Conference on Lasers and Electro-Optics 2004 (Vol. 2). USA: IEEE.CThQ4 All optical 160 to 10 Gbit/s demultiplexing using co-propagating optical clock J. Seoane, A. 1. Siahlo, A. T. Clausen, 1,. K. Oxenlgwe, Z. Xu, P. Jeppesen Research Center COM, Technical Univerriw of Denmark. Kgs. Lyngby. DK-2800. Denmark jrg@com.dru.dk Abstract: All optical demultiplexing of a 160 GbiVs optical time domain multiplexed signal using a CO-propagating 10 GHz optical clock as conuol signal into a nonlinear optical loop mirror is demonstrated. 02033 Optical Society of America OCIS codes: ~060.4510) Optical communications: (060.2360) Fiber optics links and subsystems 1. Introduction As research interest is shifted to bit rates beyond 40 GbitIs, the. lack of electronics coping with these bit rates has made Optical Time Domain Multiplexing (OTDM) the technology of choice. This increases the complexity of the receiver. Common schemes require a clock recovery circuit driving a laser source [1,2] or high-speed electro absorption modulator (EAM) [3]. We deinonsuate a simplified receiver configuration in which a co-propagating 10FHz optical clock based on narrow pulses is used, without OIEconversion, to generate the switching window in a Nonlinear Optical Loop Mirror (NOLM) based receiver. 2. Experimental setup A schematic of the experimental setup is shown in Fig. 1. A single mode-locked fiber ring laser (ML-FRL) generates 10 GHz pulse wains at 1558 nm, corresponding to the zero dispersion wavelength of the link. A pulse train is modulated by a Mach-Zehnder modulator using Z7-l to Z3'-l PRBS data, and injected into a Z7-l PRBS maintaining multiplexer (MUX) to generate a 160 GbiVs OTDM data stream. A second pulse train is launched into a h-converter unit based on a NOLM to generate the optical clock signal at 1540 nm. Fig. 1. Expeemental seNp. Amngle pulse source is required for generation and demultiplexing. Broadening of the clock signal is minimized at the recnver by adding exwa length of SSMF The link comprises 80 km of Standard Single Mode Fiber (SSMF) and 13 km of Dispersion Compensating Fiber ( D O .  At the receiver, the data and clock signals are independently recovered by optical filtering. The clock signal is further optically split into two. First part serves as reference for bit error rate (BER) measurements after OIE-conversion. The second part is injected into the demultiplexing NOLM to generate the switching window. 3. Discussion Fig. 2 presents the autocorrelation traces of data and clock signals injected into the demultiplexing NOLM. The figure demonstrates the feasibility of co-propagating optical clocked signals as a means to generate an Authorized licensed use limited to: Danmarks Tekniske Informationscenter. Downloaded on February 17,2010 at 04:44:49 EST from IEEE Xplore.  Restrictions apply. CThQ4 appropriate switching window at the receiver. Wavelength separation between data and clock signals, shown in I ,  0 1 0 2 0 3 0 4 0  Time (ps) Fig. 2. Autocorrelation and spectra traces of data and clock sigoals BER me.asuremeuts are presented in Fig. 3. A low 2 dB sensitivity penalty with no error floor was observed after transmission. Eye diagrams of the original 160 Gbit/s OTDM signal are presented in the upper inset. Upper and bottom eye diagrams of the lower inset show respectively a typical demultiplexed optical signal and the corresponding electrical signal injected into the receiver at BER of 1 ~ 1 0 ~ ~ .  5 6 B : 7  5 -' 8  9 10 -36 -31 4 2  -30 -28 Power (dEIm) Fig. 3. BER measurements and eye diagrams of the data and a typical demultiplexed signal. 4. Conclusion AU optical demultiplexing of a 160 Gbids OTDM signal to the 10 Gbit/s line rate has been demonsuated with a single pulse source using a co-propagating 10 GHz optical clock to generate a sufficiently narrow switching window in a NOLM-based receiver. Low transmission penalty and no error floor were observed. The amount of equipment required for demultiplexing OTDM systems is minimized. RefWe"Ce 1. T. Yamamow et al., '640-Gbitds Optical TDM Transmission Over 92 krn Through a Dispersion-Managed Fiber Conksting of Single-Mode Fiber and Reverse Dispersion Fiber", IEEE Fbotoo. Techno. Letters, 12, 353-355 (ZOM)). 2 .  L.K. Oaenl0we et al.. "A novel 160 Gbls receiver configuration including a glass ciystal pulse laser. phownic crystal fibre and a simple dynamic clock recovery scheme". Th2.53, ECOC 2003. 3. B. Mikkelsen el al., "High spectral efficiency (0.53 biVdHr) WDM transmission of I 6 0  Gbls per wevelength ova  400'km of fiber", ThF2. OFC 2001. Authorized licensed use limited to: Danmarks Tekniske Informationscenter. Downloaded on February 17,2010 at 04:44:49 EST from IEEE Xplore.  Restrictions apply. 

All optical 160 to 10 Gbit/s demultiplexing using co-propagating optical clock

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All optical 160 to 10 Gbit/s demultiplexing using co-propagating optical clock

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