Generation of high-quality sub-picosecond optical pulses using a combination of normal and anomalous dispersion fibers
نویسندگان
چکیده
A practical method for generating high-quality optical pulses of sub-picosecond pulse widths is presented. The method uses linear chirp generation in supercontinuum pulses in a normal dispersion fiber. This linear chirp is utilized by an anomalous dispersion fiber to shorten the pulse widths down to a few hundreds of femtoseconds. This compression method results in 0.28-ps 10-GHz optical pulses. We also demonstrate that optical filtering increases the pulse contrast ratio above 30 dB but widens the pulse to 0.32 ps. This pulse performance is sufficient for 640 Gb/s transmission.
منابع مشابه
Generation of 20-GHz picosecond pulse trains in the normal and anomalous dispersion regimes of optical fibers
In this paper, we numerically and experimentally study two methods to generate 20GHz pulse trains at 1550 nm from a dual-frequency beat-signal. The first method is based on the multiple four-wave mixing temporal compression occuring in the anomalous dispersion regime of a standard optical fiber (SMF). In the second original method, the initial sinusoidal signal is first converted into a parabol...
متن کاملDirect comparison of shot-to-shot noise performance of all normal dispersion and anomalous dispersion supercontinuum pumped with sub-picosecond pulse fiber-based laser
Coherence of supercontinuum sources is critical for applications involving characterization of ultrafast or rarely occurring phenomena. With the demonstrated spectral coverage of supercontinuum extending from near-infrared to over 10 μm in a single nonlinear fiber, there has been a clear push for the bandwidth rather than for attempting to optimize the dynamic properties of the generated spectr...
متن کاملSquare Lattice Elliptical- Core Photonic Crystal Fiber Soliton-Effect Compressor at 1550nm
In this paper, we investigate the evolution of supercontinuum and femtosecond optical pulses generation through square lattice elliptical-core photonic crystal fiber (PCF) at 1550 nm by using both full-vector multipole method (M.P.M) and novel concrete algorithms: symmetric split-step Fourier (SSF) and fourth order Runge Kutta (RK4) which is an accurate method to solve the general nonlinear...
متن کاملLimits of coherent supercontinuum generation in normal dispersion fibers
We study the largely unexplored transition between coherent and noise-seeded incoherent continuum generation in all-normal dispersion (ANDi) fibers and show that highly coherent supercontinua with spectral bandwidths of one octave can be generated with long pump pulses of up to 1.5 ps duration, corresponding to soliton orders of up to N 600. In terms of N , this corresponds to an approximately ...
متن کاملExperimental demonstration of nonlinear pulse propagation in a fiber Bragg grating written in a fiber amplifier.
We study experimentally nonlinear propagation of sub-nanosecond optical pulses in a fiber Bragg grating written in a Ytterbium-doped fiber amplifier (YD-FBG). The magnitude and the sign of group velocity dispersion (GVD) in YD-FBG can be controlled by adjusting the fiber tension. In the case of anomalous GVD, pulse breakup was observed due to modulation instability. However, for the same input ...
متن کامل