A holey fiber-based nonlinear thresholding device for optical CDMA receiver performance enhancement

Lee, J.H.; Teh, P.C.; Yusoff, Z.; Ibsen, M.; Belardi, Walter; Monro, Tanya M.; Richardson, David J.

doi:10.1109/lpt.2002.1003123

Cited by 78 publications

(35 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In these experiments, SC generation can be achieved with a short highly nonlinear PCF. In OCDM receiving end, the fast fiber-based nonlinear thresholding devices can be used to enhance receiver performance (Sardesai et al 1998;Lee et al 2002b), and a nonlinear thresholder based on bandpass filtering of spectrally broadened components generated by SPM and assisted by Raman effect in an 8.7 m PCF has been demonstrated (Lee et al 2002c).…”

Section: Other Potential Applicationsmentioning

confidence: 99%

Applications of Nonlinear Effects in Highly Nonlinear Photonic Crystal Fiber to Optical Communications

Sang

Chu

2005

Opt Quant Electron

View full text Add to dashboard Cite

Optical and Quantum Electronics (2005) 37:965-994 © Springer 2005Applications of nonlinear effects in highly nonlinear photonic crystal fiber to optical communications Abstract. Unique dispersion characteristics and enhanced nonlinearity make the small-core photonic crystal fiber (PCF) an ideal candidate for nonlinear optical devices to telecommunication applications. Some technical reasons behind great research interest of highly nonlinear PCFs in optical communication components are reviewed. Nonlinear effects in highly nonlinear PCFs and their research progress are presented. Several typical applications including WDM sources, optical amplification, optical switching, wavelength conversion, optical regeneration and all-optical demultiplexing etc are introduced, together with state-of-the art performances. Some new possible applications and future prospects are discussed.Key words: nonlinear optics, optical fiber communication, nonlinear effects, optical fiber devices, photonic crystal fiber the core is hollow. This hollow core PCF has an operating principle that is significantly different from the solid core index guided fiber, which exploits the photonic band gap effect to guide light. PCFs can be designed to satisfy many specific applications, for example: to be single mode over an extremely broad wavelength range (Birks et al. 1997); to support larger or smaller mode field diameters (Knight et al. 1998;Broderick et al. 1999); to meet specific dispersion requirements ; to increase or decrease nonlinearity (Finazzi et al. 2003;; and to be highly birefringent resulting in improved polarization control (Hansen et al. 2001;Orgigosa-Blanch et al. 2004) . For applications of typical nonlinear characteristics of PCF to optical communications, the small solid core PCFs with high nonlinearity are preferred, and we will discuss them here. Due to the high index difference between silica core and air hole cladding, these PCFs allow much stronger mode confinement, and thereby much higher nonlinearities (Finazzi et al. 2003). In addition, the PCFs allow a more flexible tailoring of the dispersion properties , which are crucial for many applications of nonlinear effects. Nonlinear effects in the PCF are currently a research topic of great interest, and great progress has been made in the design and fabrication of PCFs. The noticeably increased nonlinear response in the PCF appears as a combination of very strong mode confinement and altered dispersion properties. Dispersion of such fibers is tailored by changing their core-cladding geometry, while a strong light-field confinement is due to the high refractive-index step between the core and the holey cladding, which would allow nonlinear optical interactions to be enhanced without increasing the energy of light. This makes it possible to compact and cost-effective telecommunication devices with short fibers and relatively low cost light sources, which are the principal drawbacks of previously demonstrated fiber-based nonlinear optical devices.Recently, PCFs with high nonli...

show abstract

Section: Other Potential Applicationsmentioning

confidence: 99%

Applications of Nonlinear Effects in Highly Nonlinear Photonic Crystal Fiber to Optical Communications

Sang

Chu

2005

Opt Quant Electron

View full text Add to dashboard Cite

show abstract

“…Fiber grating encoders have been used to demonstrate two simultaneous frequency-overlapped 1.25-Gb/s users using fast electronics for waveform discrimination [26]. Fiber gratings were also used in a single-user 1.25-Gb/s experiment using a nonlinear fiber device for contrast enhancement; however, no testing with multiuser interference was reported [25]. An OCDMA/WDM/TDM overlay experiment demonstrated very high aggregate bit rates but relied on synchronous nonlinear gating in the receiver, with timing coordination and synchronism required down to 1 ps [20], [21].…”

Section: Introductionmentioning

confidence: 99%

“…Compared with previous literature, there are two key points, as follows: 1) full interference suppression with four users at gigabit-per/second rates without the need for chip-level timing coordination or synchronous gating and 2) the use of a novel ultrasensitive nonlinear optical intensity discriminator based on second harmonic generation (SHG) in a periodically poled lithium niobate (PPLN) waveguide. The nonlinear discriminator used permits full MAI suppression at an operating energy of 200 fJ/bit, as much as two orders of magnitude lower than previous discriminators based on nonlinear fiber optics [15], [16], [20], [21], [25], [33]. The ability to operate at low power per user is critical for scaling an OCDMA system to multiple users.…”

Section: Introductionmentioning

confidence: 99%

“…5 , where is the number of channels, is the data rate, and the factor 0.5 comes from ON-OFF keying (OOK). Previous demonstrations of OCDMA nonlinear discriminators were based on nonlinear fiber optics, where typical values for range from 5-50 pJ [15], [25]. For four 2.5-Gb/s channels, this gives an average power requirement of 14-24 dBm at each receiver.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Four-user, 2.5-Gb/s, spectrally coded OCDMA system demonstration using low-power nonlinear processing

Jiang

Seo

Yang

et al. 2005

J. Lightwave Technol.

106

View full text Add to dashboard Cite

Abstract-This paper describes the demonstration of 2.5-Gb/s four-user optical-code-division-multiple-access (OCDMA) system operating at bit-error rate 10 11 utilizing programmable spectral phase encoding, an ultrasensitive ( 200 fJ/b) periodically poled lithium-niobate-waveguide nonlinear waveform discriminator and 10G Ethernet receiver. A comprehensive description of this ultra-short-pulse spectral phase-coded OCDMA system is presented. On the subsystem level, two key component technologies, namely, femtosecond encoding/decoding and low-power high-contrast nonlinear discrimination, have been developed and characterized. At the system level, data for the four-user OCDMA system operating at 2.5 Gb/s for binary as well as multilevel code families are described.Index Terms-Multiaccess interference (MAI), nonlinear optics, optical code-division multiple access (OCDMA), optical signal processing, pulse shaping.

show abstract

“…Using such fibers, it thus becomes possible to implement nonlinear telecommunication devices with reduced length/power requirements relative to similar devices based on conventional optical fiber. A number of nonlinear HF-based devices have already been demonstrated including amongst others a Raman amplifier [3], a nonlinear thresholding device for optical code-division multiple-access systems [4], and a high-speed optical time-division multiplexing demultiplexer [5].…”

mentioning

confidence: 99%

Four-wave mixing based 10-Gb/s tunable wavelength conversion using a holey fiber with a high SBS threshold

Lee

Belardi

Furusawa

et al. 2003

IEEE Photon. Technol. Lett.

Self Cite

102

View full text Add to dashboard Cite

Abstract-We demonstrate a four-wave-mixing based wavelength converter using a 15-m highly nonlinear holey fiber (HF) with a high stimulated Brillouin scattering (SBS) threshold. Error-free efficient wavelength conversion of 10-Gb/s nonreturn-to-zero signal over a 10-nm bandwidth is reliably achieved. Our 15-m HF has a nonlinearity coefficient 70( 10) W 1 km 1 and an SBS threshold of more than 130 mW. The high SBS threshold is achieved by applying structural variation to the HF along its length during the fabrication process. No modulational-instability-induced intensity noise on the converted signals is observed due to the normal dispersion of the HF.

show abstract

A holey fiber-based nonlinear thresholding device for optical CDMA receiver performance enhancement

Cited by 78 publications

References 6 publications

Applications of Nonlinear Effects in Highly Nonlinear Photonic Crystal Fiber to Optical Communications

Applications of Nonlinear Effects in Highly Nonlinear Photonic Crystal Fiber to Optical Communications

Four-user, 2.5-Gb/s, spectrally coded OCDMA system demonstration using low-power nonlinear processing

Four-wave mixing based 10-Gb/s tunable wavelength conversion using a holey fiber with a high SBS threshold

Contact Info

Product

Resources

About