Multibit delay demodulation of differential-phase shift-keying (DPSK) is finding applications in ... more Multibit delay demodulation of differential-phase shift-keying (DPSK) is finding applications in polarization interleaved modulation, optical time-domain multiplexing (OTDM), and multisymbol DPSK demodulation. Little attention has been paid to the degradation in tolerance and power penalty associated with multibit delay demodulation. We assess experimentally, numerically, and analytically the power penalties and tolerances associated with multibit delay DPSK demodulation. Numerical and analytical results show that the power penalty scales by a small factor of 0.2-0.35 dB per integer bit delay due to laser linewidth (LW) while experimental back-to-back results show a significant 1.2 dB per integer bit delay due to frequency offset penalty of longer bit delays. Frequency offset tolerance scales as 1/bit-delay and the delay-mismatch tolerance decreases by 20% for delays longer than 1 bit. A simple analytic model accounts for the combined effect of LW, frequency offset, and amplified spontaneous emission.
Page 1. 10-Packet-Depth, 40 Gb/s Optical Buffer with a <0.5 ns Reconfiguration Time us... more Page 1. 10-Packet-Depth, 40 Gb/s Optical Buffer with a <0.5 ns Reconfiguration Time using 116 ns, Continuously Tunable Conversion/Dispersion Delays OF Yilmaz, SR Nuccio, X. Wu, and AE Willner Dept. of Electrical Engineering ...
... Reza Salem (1), Scott Nuccio (2), Vahid R. Arbab (2), Xiaoxia Wu (2) Mark A. Foster (1), Davi... more ... Reza Salem (1), Scott Nuccio (2), Vahid R. Arbab (2), Xiaoxia Wu (2) Mark A. Foster (1), David F. Geraghty (1), Alan E. Willner ... Developing optical functionalities that do not rely on high-speed electronic circuits will increase the speed and flexibility of networks by eliminating the ...
Page 1. Experimental Synchronization Monitoring of I/Q Data and Pulse-Carving Temporal Misalignme... more Page 1. Experimental Synchronization Monitoring of I/Q Data and Pulse-Carving Temporal Misalignment for a Serial-Type 80-Gbit/s RZ-DQPSK Transmitter Xiaoxia Wu (1), Louis Christen (1), Scott R. Nuccio (1), Omer Faruk ...
We experimentally demonstrate a technique for monitoring the time misalignment of in-phase/quadra... more We experimentally demonstrate a technique for monitoring the time misalignment of in-phase/quadrature (I/Q) data streams and pulse carver/data in a 20-Gb/s return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK) transmitter. By measuring the radio-frequency clock-tone power at 10 GHz and low frequency power at 600 MHz, a monitoring power dynamic range of 18 dB is obtained for I/Q data misalignment and 6 dB is shown for carver/data misalignment. With the monitor information, a simple feedback loop is proposed to automatically align the RZ-DQPSK transmitter. Index Terms-Fiber-optics communications, return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK).
We experimentally demonstrate chirp-free 40-GHz CSRZ optical pulse generation using a 10-GHz Mach... more We experimentally demonstrate chirp-free 40-GHz CSRZ optical pulse generation using a 10-GHz Mach-Zehnder modulator (MZM) biased at the maximum transmission and a 25-ps delay line interferometer (DLI). The unwanted 20-GHz low frequency component is suppressed by about 25-dB.
We experimentally demonstrate an all-optical chromatic dispersion monitoring technique utilizing ... more We experimentally demonstrate an all-optical chromatic dispersion monitoring technique utilizing cross-phase modulation in highly-nonlinear fiber for 40-Gb/s RZ-DPSK. Maximum monitored power variation of 16.5-dB is achieved in the presence of up to 120-ps/nm chromatic dispersion.
We experimentally demonstrate the use of continuously tunable optical parametric delay at 160-Gbi... more We experimentally demonstrate the use of continuously tunable optical parametric delay at 160-Gbit/s based on conversion/dispersion for demultiplexing a 160-Gbit/s signal to 40-Gbit/s. A 15.2 ns delay with <0.1 ps resolution is shown, which introduces 3-6 dB power penalty.
We experimentally demonstrate 40-320 Gbit=s phase-coherent multiplexing based on cross-phase modu... more We experimentally demonstrate 40-320 Gbit=s phase-coherent multiplexing based on cross-phase modulation and subsequent 320-40 Gbit=s demultiplexing using cross-phase-modulation-induced frequency shift in highly nonlinear fibers. An average penalty of approximately 7 dB at a 10 −9 bit-error rate is observed after the nonlinear processes. We also show the generation of a phase-coherent 320 GHz optical pulse train. A delay-line interferometer based on differential group delay is used to verify the phase coherence characteristic of the multiplexed 320 Gbit=s signal and the generated 320 GHz pulses.
We experimentally demonstrate a continuously tunable, all-optical packet buffer based on conversi... more We experimentally demonstrate a continuously tunable, all-optical packet buffer based on conversion dispersion delays. 40-Gb/s asynchronous transfer mode (ATM) packets with return-to-zero ON-OFF keying data are buffered up to ten-packet length (116 ns). The packet buffer performance is characterized for several delay values. Power penalties of 3, 2, and 0.5 dB for zero-packet, five-packet, and ten-packet delays are achieved, respectively, at a bit error rate (BER) of 10 9. Reconfiguration of the packet buffer is also investigated and reconfiguration times as fast as 25 ps are shown by using a high-speed optical switch to toggle between wavelength conversion pumps. The reconfiguration is also demonstrated for a 1 ns guard time between the packets. It is observed that reconfiguration with this method results in 1.1 and 2 dB extra power penalty at 10 9 BER for 1 and 25 ps guard times, respectively.
We report the orthogonal tributary channel exchange of a polarization-multiplexed (pol-muxed) dif... more We report the orthogonal tributary channel exchange of a polarization-multiplexed (pol-muxed) differential phase-shift keying (DPSK) optical time-division multiplexed (OTDM) signal by exploiting the Kerr effect-induced nonlinear birefringence in a highly nonlinear fiber (HNLF). We first implement Kerr effect-based 40-to-10, 80-to-10, and 160to-10 Gbit/s demultiplexing of DPSK OTDM signals with power penalties of less than 0.5, 1.5, and 2.6 dB, respectively, at a bit-error rate (BER) of 10 9. We further demonstrate 10-Gbit/s tributary channel exchange between two orthogonal polarizations of a 160-Gbit/s pol-muxed DPSK OTDM signal with a power penalty of less than 4 dB at a BER of 10 9. Moreover, Jones matrix analyses are applied to the orthogonal polarization exchange, indicating the exchange condition of orthogonal polarization exchange with the characteristic of transparency to the modulation format. The exchange performance is analyzed in terms of the extinction ratio (ER) of the newly converted signal to the original residual signal. The dynamic range of the product of nonlinear coefficient, pump power, and effective fiber length, the dynamic range of pump power, the impact and tolerance of pump polarization offset are discussed to characterize and optimize the performance of orthogonal polarization exchange.
IEEE Journal of Selected Topics in Quantum Electronics, Sep 1, 2010
We experimentally demonstrate several high-speed wavelength division multiplexing (WDM) to time d... more We experimentally demonstrate several high-speed wavelength division multiplexing (WDM) to time division multiplexing (TDM) conversion schemes by using different nonlinearities in highly nonlinear fiber (HNLF). 40-160-Gb/s WDM-to-TDM conversion using cross-phase modulation (XPM) and 160-320-Gb/s conversion based on supercontinuum generation are shown. Furthermore, we investigate a different kind of HNLF, and demonstrate 40-80-Gb/s WDM-to-TDM conversion using XPM in a 0.8-m bismuth oxide HNLF (Bi-HNLF). Less than 3-dB power penalty is obtained for each case. Index Terms-Optical fiber communication, time division multiplexing (TDM), ultrafast nonlinear processes, wavelength division multiplexing (WDM).
A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated ... more A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated by utilizing advanced multilevel phase-modulated formats. A 60 ps symbol delay with error-free demodulation of both I and Q channels for 10 Gbit/s return-to-zero differential-quadrature-phase-shift-keyed (DQPSK) signals via a broadband stimulated Brillouin scattering-based slow-light medium is achieved experimentally. Simulation results on 20 Gbit/s DQPSK and 30 Gbit/s D8PSK propose to transmit very high spectrally efficient multilevel formats through a bandwidth-limited slow-light element.
We demonstrate experimentally and through simulations a simultaneous and independent monitoring o... more We demonstrate experimentally and through simulations a simultaneous and independent monitoring of CD, PMD and OSNR using a frac14-bit delay Mach- Zehnder interferometer for NRZ-OOK, DPSK and Duobinary modulation formats.
Multibit delay demodulation of differential-phase shift-keying (DPSK) is finding applications in ... more Multibit delay demodulation of differential-phase shift-keying (DPSK) is finding applications in polarization interleaved modulation, optical time-domain multiplexing (OTDM), and multisymbol DPSK demodulation. Little attention has been paid to the degradation in tolerance and power penalty associated with multibit delay demodulation. We assess experimentally, numerically, and analytically the power penalties and tolerances associated with multibit delay DPSK demodulation. Numerical and analytical results show that the power penalty scales by a small factor of 0.2-0.35 dB per integer bit delay due to laser linewidth (LW) while experimental back-to-back results show a significant 1.2 dB per integer bit delay due to frequency offset penalty of longer bit delays. Frequency offset tolerance scales as 1/bit-delay and the delay-mismatch tolerance decreases by 20% for delays longer than 1 bit. A simple analytic model accounts for the combined effect of LW, frequency offset, and amplified spontaneous emission.
Page 1. 10-Packet-Depth, 40 Gb/s Optical Buffer with a &amp;lt;0.5 ns Reconfiguration Time us... more Page 1. 10-Packet-Depth, 40 Gb/s Optical Buffer with a &amp;lt;0.5 ns Reconfiguration Time using 116 ns, Continuously Tunable Conversion/Dispersion Delays OF Yilmaz, SR Nuccio, X. Wu, and AE Willner Dept. of Electrical Engineering ...
... Reza Salem (1), Scott Nuccio (2), Vahid R. Arbab (2), Xiaoxia Wu (2) Mark A. Foster (1), Davi... more ... Reza Salem (1), Scott Nuccio (2), Vahid R. Arbab (2), Xiaoxia Wu (2) Mark A. Foster (1), David F. Geraghty (1), Alan E. Willner ... Developing optical functionalities that do not rely on high-speed electronic circuits will increase the speed and flexibility of networks by eliminating the ...
Page 1. Experimental Synchronization Monitoring of I/Q Data and Pulse-Carving Temporal Misalignme... more Page 1. Experimental Synchronization Monitoring of I/Q Data and Pulse-Carving Temporal Misalignment for a Serial-Type 80-Gbit/s RZ-DQPSK Transmitter Xiaoxia Wu (1), Louis Christen (1), Scott R. Nuccio (1), Omer Faruk ...
We experimentally demonstrate a technique for monitoring the time misalignment of in-phase/quadra... more We experimentally demonstrate a technique for monitoring the time misalignment of in-phase/quadrature (I/Q) data streams and pulse carver/data in a 20-Gb/s return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK) transmitter. By measuring the radio-frequency clock-tone power at 10 GHz and low frequency power at 600 MHz, a monitoring power dynamic range of 18 dB is obtained for I/Q data misalignment and 6 dB is shown for carver/data misalignment. With the monitor information, a simple feedback loop is proposed to automatically align the RZ-DQPSK transmitter. Index Terms-Fiber-optics communications, return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK).
We experimentally demonstrate chirp-free 40-GHz CSRZ optical pulse generation using a 10-GHz Mach... more We experimentally demonstrate chirp-free 40-GHz CSRZ optical pulse generation using a 10-GHz Mach-Zehnder modulator (MZM) biased at the maximum transmission and a 25-ps delay line interferometer (DLI). The unwanted 20-GHz low frequency component is suppressed by about 25-dB.
We experimentally demonstrate an all-optical chromatic dispersion monitoring technique utilizing ... more We experimentally demonstrate an all-optical chromatic dispersion monitoring technique utilizing cross-phase modulation in highly-nonlinear fiber for 40-Gb/s RZ-DPSK. Maximum monitored power variation of 16.5-dB is achieved in the presence of up to 120-ps/nm chromatic dispersion.
We experimentally demonstrate the use of continuously tunable optical parametric delay at 160-Gbi... more We experimentally demonstrate the use of continuously tunable optical parametric delay at 160-Gbit/s based on conversion/dispersion for demultiplexing a 160-Gbit/s signal to 40-Gbit/s. A 15.2 ns delay with <0.1 ps resolution is shown, which introduces 3-6 dB power penalty.
We experimentally demonstrate 40-320 Gbit=s phase-coherent multiplexing based on cross-phase modu... more We experimentally demonstrate 40-320 Gbit=s phase-coherent multiplexing based on cross-phase modulation and subsequent 320-40 Gbit=s demultiplexing using cross-phase-modulation-induced frequency shift in highly nonlinear fibers. An average penalty of approximately 7 dB at a 10 −9 bit-error rate is observed after the nonlinear processes. We also show the generation of a phase-coherent 320 GHz optical pulse train. A delay-line interferometer based on differential group delay is used to verify the phase coherence characteristic of the multiplexed 320 Gbit=s signal and the generated 320 GHz pulses.
We experimentally demonstrate a continuously tunable, all-optical packet buffer based on conversi... more We experimentally demonstrate a continuously tunable, all-optical packet buffer based on conversion dispersion delays. 40-Gb/s asynchronous transfer mode (ATM) packets with return-to-zero ON-OFF keying data are buffered up to ten-packet length (116 ns). The packet buffer performance is characterized for several delay values. Power penalties of 3, 2, and 0.5 dB for zero-packet, five-packet, and ten-packet delays are achieved, respectively, at a bit error rate (BER) of 10 9. Reconfiguration of the packet buffer is also investigated and reconfiguration times as fast as 25 ps are shown by using a high-speed optical switch to toggle between wavelength conversion pumps. The reconfiguration is also demonstrated for a 1 ns guard time between the packets. It is observed that reconfiguration with this method results in 1.1 and 2 dB extra power penalty at 10 9 BER for 1 and 25 ps guard times, respectively.
We report the orthogonal tributary channel exchange of a polarization-multiplexed (pol-muxed) dif... more We report the orthogonal tributary channel exchange of a polarization-multiplexed (pol-muxed) differential phase-shift keying (DPSK) optical time-division multiplexed (OTDM) signal by exploiting the Kerr effect-induced nonlinear birefringence in a highly nonlinear fiber (HNLF). We first implement Kerr effect-based 40-to-10, 80-to-10, and 160to-10 Gbit/s demultiplexing of DPSK OTDM signals with power penalties of less than 0.5, 1.5, and 2.6 dB, respectively, at a bit-error rate (BER) of 10 9. We further demonstrate 10-Gbit/s tributary channel exchange between two orthogonal polarizations of a 160-Gbit/s pol-muxed DPSK OTDM signal with a power penalty of less than 4 dB at a BER of 10 9. Moreover, Jones matrix analyses are applied to the orthogonal polarization exchange, indicating the exchange condition of orthogonal polarization exchange with the characteristic of transparency to the modulation format. The exchange performance is analyzed in terms of the extinction ratio (ER) of the newly converted signal to the original residual signal. The dynamic range of the product of nonlinear coefficient, pump power, and effective fiber length, the dynamic range of pump power, the impact and tolerance of pump polarization offset are discussed to characterize and optimize the performance of orthogonal polarization exchange.
IEEE Journal of Selected Topics in Quantum Electronics, Sep 1, 2010
We experimentally demonstrate several high-speed wavelength division multiplexing (WDM) to time d... more We experimentally demonstrate several high-speed wavelength division multiplexing (WDM) to time division multiplexing (TDM) conversion schemes by using different nonlinearities in highly nonlinear fiber (HNLF). 40-160-Gb/s WDM-to-TDM conversion using cross-phase modulation (XPM) and 160-320-Gb/s conversion based on supercontinuum generation are shown. Furthermore, we investigate a different kind of HNLF, and demonstrate 40-80-Gb/s WDM-to-TDM conversion using XPM in a 0.8-m bismuth oxide HNLF (Bi-HNLF). Less than 3-dB power penalty is obtained for each case. Index Terms-Optical fiber communication, time division multiplexing (TDM), ultrafast nonlinear processes, wavelength division multiplexing (WDM).
A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated ... more A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated by utilizing advanced multilevel phase-modulated formats. A 60 ps symbol delay with error-free demodulation of both I and Q channels for 10 Gbit/s return-to-zero differential-quadrature-phase-shift-keyed (DQPSK) signals via a broadband stimulated Brillouin scattering-based slow-light medium is achieved experimentally. Simulation results on 20 Gbit/s DQPSK and 30 Gbit/s D8PSK propose to transmit very high spectrally efficient multilevel formats through a bandwidth-limited slow-light element.
We demonstrate experimentally and through simulations a simultaneous and independent monitoring o... more We demonstrate experimentally and through simulations a simultaneous and independent monitoring of CD, PMD and OSNR using a frac14-bit delay Mach- Zehnder interferometer for NRZ-OOK, DPSK and Duobinary modulation formats.
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Papers by Scott Nuccio