1,720,964 research outputs found
High-quality, soliton loss-compensation in a 38km dispersion decreasing fibre
No full textWe report the fabrication of a 38 km soliton loss-compensating, dispersion decreasing fibre with an exponential dispersion profile accurately matched to the fibre loss. High quality, loss compensation for 3.5 ps soliton pulses over 38 km (~19 soliton periods) is demonstrated for the first time to our knowledge
Dark soliton generation and propagation using a normally dispersive, dispersion decreasing fiber
No full textThe generation and propagation of bright and dark soliton pulses is an area of great scientific interest with relevance to many futuristic telecommunication and optical-processing applications. Bright solitons have been the subject of intense experimental investigation; however, the experimental study of dark soliton behaviour has been limited. This situation is in no small part due to the difficulty of generating and measuring such pulse forms [1,2,3]. (for review see Ref.[4] and references within)
Transmission and modulation of 30-40 GHz pulses generated by a diode-driven, low-jitter, beat-signal to soliton train conversion source
No full textWe report on the performance of a low timing-jitter, diode-driven, Nd:YLF pumped 5ps, 30-40 GHz soliton source based on beat signal conversion in a dispersion decreasing fibre. We demonstrate for the first time data encoding at 40 Gbit/s and transmission of the pulse trains over 205 km
High-frequency bright and dark soliton sources based on dispersion-profiled fibre circuitry and their applications
No full textWe report advances in the area of soliton generation using beat signal conversion. In particular, we describe the development of a diode-driven, 40 GHz bright soliton source with sub 300 fs pulse jitter. Furthermore we report pulse transmission and all-optical data encoding at 40 Gbit/s
Experimental demonstration of 100 GHz dark soliton generation and propagation using a +GVD dispersion decreasing fiber
No full textThe authors report the first experimental demonstration of high-frequency dark soliton generation through nonlinear conversion of a high-intensity beat signal in a +GVD dispersion decreasing fibre. High quality, 1.6ps dark soliton generation at 100GHz is obtained. The quality or the pulses and the stability of the trains are demonstrated by propagation through a 2.2km span of -GVD dispersion shifted fibre (~ two soliton periods)
Dispersion decreasing fibres for soliton generation and transmission line loss compensation
No full textThe idea of varying the axial distribution of dispersion along a length of optical fibre as a means of manipulating and controlling the soliton supporting nature of the fibre and thereby the characteristics of soliton pulses propagating through the medium has been around for some while. A number of specific applications have been suggested in particular techniques for bright and dark soliton generation, pulse compression and most notably techniques for high frequency soliton transmission. The experimental realisation of most of these techniques however has been hindered by difficulties in the reliable fabrication of dispersion varying fibres. A technique for the fabrication of such fibres was first developed by workers at General Physics Institute, Moscow. Control of the waveguide dispersion was achieved by active control of fibre diameter during the pull. Fibre lengths of up to 2km were fabricated and successfully used in the first experimental demonstrations of high frequency (>60 GHz) bright soliton generation and pulse compression. Subsequent to these first experimental results a number of other groups have commenced fabrication programs on such fibres, extending the techniques to fibre lengths of 40km. In this presentation we describe our latest achievements in Dispersion Decreasing Fibre (DDF) fabrication and report on two applications of the technology. Firstly, we describe a robust, diode-pumped, 40GHz bright soliton transmitter, and secondly we demonstrate loss compensation in a 38km loss-matched dispersion varying fibre
Periodically amplified transmission system based on loss compensating dispersion decreasing fibre
No full textAmplified transmission lines based on loss compensating dispersion decreasing fibres (LCDDFs), i.e. fibres in which the dispersion profile is made to follow that of the fibre loss, are a promising medium for the transmission of high bit-rate, ultrashort soliton pulses. Due to the perfect match between nonlinearity and dispersion at all points in the fibre LCDDFs provide access to propagation regimes (both single channel and WDM) made inaccessible by the periodic amplification process in systems based on conventional dispersion shifted fibre (DSF). To date soliton loss compensation has only been demonstrated in single pulse, single span propagation experiments. In this presentation, we describe the first experimental demonstration of a periodically amplified transmission system based on LCDDFs. We report error free transmission of: (a) 10 Gbit/s, 6.5ps pulses over 8 amplification cycles (304km) for a system with a mean dispersion of 2.4ps/(nm.km) and 38km amplifier spacing, L). The results indicate the potential of the technique to enter propagation regimes made inaccessible by conventional average soliton techniques. The measurements also highlight the limiting effect of the soliton acoustic interaction which can be severe in these types of system, in which the minimum realistically achievable RMS path average dispersion tends to be higher than that of a conventional DSF system. The limiting effects of third order dispersion are also observed
All-optical modulation of 40GHz beat frequency conversion soliton source
No full textThe authors report the first error-free direct optical modulation of 40GHz pulses generated by a low-jitter beat frequency to soliton train conversion source
Periodically amplified system based on loss compensating dispersion decreasing fibre
No full textWe demonstrate for the first time to our knowledge the use of loss compensating, dispersion decreasing fibre (LCDDF) in a periodically amplified transmission system. The significant limiting effects of the soliton acoustic interaction and third order dispersion are observed and discussed. The results illustrate the potential of such techniques for extending data transmission to regimes forbidden by conventional average soliton dynamics
Demonstration of 205km transmission of 35GHz, 5ps pulses generated from a diode-driven, low jitter, beat-signal to soliton conversion source
No full textThe authors discuss the performance of a low-timing-jitter, diode-driven, Nd:YLF pumped 5ps. 30-40GHz soliton source based on beat-signal conversion in a dispersion-decreasing fibre. In addition. the first experimental demonstration is reported of long-distance (205km) propagation of such pulse streams in an amplified transmission line incorporating three amplifiers at 50km amplifier spacing
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