Demultiplexing of 80-Gb/s pulse-position modulated data with an ultrafast nonlinear interferometer

Hamilton, Scott A.; Ippen, Erich P.

doi:10.1109/68.980519

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…Here, we discuss SOA-based ultrafast nonlinear interferometer (UNI) [11], whose conversion speed is not limited by the slow carrier recombination rate of SOA. For its ultrafast response, UNI is used in clock and data recovery [12], optical sampling [13], and as a demultiplexer [14,15] in high-speed OTDM systems. In this article, we show that UNI can also be used in high speed wavelength conversion.…”

Section: Introductionmentioning

confidence: 99%

PMD mitigation and wavelength conversion using a SOA‐based interferometric switch

Wang

2008

Micro & Optical Tech Letters

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total increment of 0.075 nm. Figure 7 shows the Bragg wavelength shift is changed as a function of the applied current. In this device, wavelength shift is a linear function of current. For the temperature effect, a constant current of 1 A is selected and the temperature is increased from 25 to 65°C at an increment of 10°C. The distance between SFG sensor and solenoid is 1 cm. A 1548.112 nm Bragg wavelength is selected to demonstrate the sensing scheme. The reflection spectra versus various temperatures are shown in Figure 8. The Bragg wavelength is increased from 1548.112 to 1548.159 nm with a total increment of 0.047 nm. Figure 9 shows the Bragg wavelength shift is changed as a function of the applied temperature. Wavelength shift in this device is a linear function of temperature. CONCLUSIONThis sensor has been demonstrated to measure AC currents over a wide range of parameters. The sensing head is based on an SFG, which has good linear properties and can be applied to monitor the Bragg wavelength shift caused by solenoid-created magnetic force. The proposed scheme for measuring AC current is a simple and compact configuration and can provide a portable current sensor for AC current measurement. ABSTRACT:We propose a new application of the SOA-based wavelength conversion, which can realize polarization mode dispersion (PMD) mitigation for 10 GHz picosecond optical pulse. Both PMD mitigation and wavelength conversion are demonstrated by experiments.

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Section: Introductionmentioning

confidence: 99%

PMD mitigation and wavelength conversion using a SOA‐based interferometric switch

Wang

2008

Micro & Optical Tech Letters

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“…In this article, the SOA-based interferometer is studied both in theory and experiments, which is similar to the ultrafast nonlinear interferometer (UNI) [5] except that no pump pulse is injected. For the ultrafast response of UNI, it is used in clock and data recovery [6], optical sampling [7], and as a demultiplexer [8,9] in highspeed OTDM systems. Here, the reshaping capability of this simple interferometer without control pulse injecting is demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Reshaping of picosecond optical pulses with a simple interferometer

Zhou

Wang

2007

Micro & Optical Tech Letters

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In optical fiber communication systems, reshaping is crucial for long-haul transmission and networks due to the accumulated noise and dispersion, which will gradually degrade the signals. In this article, a SOA (Semiconductor Optical Amplifier)-based interferometer Figure 6Comparisons of return losses between measurements and simulations for two bonding wires INTRODUCTIONIn future optical networks, transmission of high bit rate optical signals will likely involve regenerators to suppress signal degradation induced by accumulation of noise, jitter, and dispersion, which otherwise would severely limit the network size [1]. The chromatic dispersion and polarization mode dispersion of the transmission fibers may be the major contributors to the degradations in the time domain [2]. Now many kinds of schemes have been investigated to overcome these problems, including the different kinds of all-optical regenerators [3, 4]. Still, in most methods reported so far, the regeneration is performed at the expense of an increased complexity, which is not suitable for future highspeed networks. In this article, the SOA-based interferometer is studied both in theory and experiments, which is similar to the ultrafast nonlinear interferometer (UNI) [5] except that no pump pulse is injected. For the ultrafast response of UNI, it is used in clock and data recovery [6], optical sampling [7], and as a demultiplexer [8, 9] in highspeed OTDM systems. Here, the reshaping capability of this simple interferometer without control pulse injecting is demonstrated. The picosecond optical pulses with repetition rate of 10 GHz distorted by dispersion shift fiber (DSF) and dispersion compensation fiber (DCF), respectively are reshaped successfully in experiments. THEORYThe configuration used to demonstrate the reshaping capability of UNI without control pulse injecting is shown in Figure 1. The folded configuration shown in the figure was adopted for better stability of the interferometer. The pulse was aligned with the polarization maintaining (PM) ports of the polarization beam splitter (PBS) using PC1. The common port of the PBS was spliced to the polarization maintaining fiber (PMF) with 45°offset. Then the input signal pulse is split into two orthogonally polarized pulses that are separated by T interval after traversing the PMF. The delay time T is determined by the length of PMF and refractive index difference between fast axis and slow axis in PMF. The amplitude of the orthogonal polarization components is E l and E twhere E in is the amplitude of input optical pulse. Then the two orthogonal polarization components enter the SOA with the time interval of T. Because of the refractive index and gain nonlinearities of SOA, the trailing component will experience different gain and phase shift, compared with the leading one. Let G l ͑t͒ and l ͑t͒ be the gain and phase shift of the leading component after passing the SOA. G t ͑t͒ and t ͑t͒ are for the trailing one. Then the amplitudes of the two orthogonal polarization components ...

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“…In order to alleviate pattern dependency caused by the energy variability of different bit, pulse-position modulation (PPM) is proposed for the control pulse data stream [4,5]. It is a modulation format with constant energy per bit, in which a pulse in the first half of the bit slot represents "0" and a pulse in the second half of the bit slot represents "1" [4].…”

Section: Introductionmentioning

confidence: 99%

“…It is a modulation format with constant energy per bit, in which a pulse in the first half of the bit slot represents "0" and a pulse in the second half of the bit slot represents "1" [4]. It can be easily implemented in OTDM system [4]. Using PPM, significant reduction of the pattem dependency is obtained [5].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of pattern dependency of all-optical logic XOR based on TOAD using pulse-position modulation

Yan

Lin

2005 Quantum Electronics and Laser Science Conference

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Demultiplexing of 80-Gb/s pulse-position modulated data with an ultrafast nonlinear interferometer

Cited by 10 publications

References 10 publications

PMD mitigation and wavelength conversion using a SOA‐based interferometric switch

PMD mitigation and wavelength conversion using a SOA‐based interferometric switch

Reshaping of picosecond optical pulses with a simple interferometer

Mitigation of pattern dependency of all-optical logic XOR based on TOAD using pulse-position modulation

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