Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper EH4_6

Pulse Shaping in Mode-Locked Ring-Cavity Fibre Lasers

Not Accessible

Your library or personal account may give you access


Rapid recent progress in passively mode-locked fibre lasers is closely linked to new nonlinear regimes of pulse generation [1,2]. Mode-locked fibre lasers are complex physical systems exhibiting a non-trivial interplay between the effects of gain, dispersion and nonlinearity. This makes such lasers interesting realizations of so-called dissipative nonlinear systems with a variety of possible pulse shaping mechanisms not yet fully explored. In this paper, we numerically demonstrate a new nonlinear regime using a laser cavity similar to that described in [1] as an example (Fig. 1). A segment of single-mode fibre (SMF) with normal group-velocity dispersion (GVD) forms the major part of the cavity, and is connected to a short length of gain fibre that provides pulse amplification. The gain fibre is followed by a saturable absorber (SA) element. The final element is a dispersive delay line (DDL) that provides anomalous GVD with negligible nonlinearity. The cavity is a ring and, thus, after the DDL the pulse returns to the SMF. Two practically tunable system parameters, namely the net cavity dispersion βnet(2) and the integrated gain of the gain fibre G, are varied to achieve different mode-locking regimes. We find that for normal net dispersion, formation of two distinct steady-state solutions of stable single pulses can be obtained in the laser cavity: the well-known self-similarly evolving pulse characterised by a parabolic shape and a linear frequency chirp, and a linearly chirped pulse that exhibits a triangular temporal form (Figs. 1, 2). To characterise the pulse shaping, we use the parameter of misfit MS between the pulse intensity profile and a parabolic or triangular fit of the same energy and full-width at half-maximum duration: MS2=dt(|u|2|uS|2)2/dt|u|4, S = P, T, where uP(t) and uT(t) correspond to the respective intensity profiles |uP(t)|2=P0,P(1t2/τP2)θ(τP|t|) and |uT(t)|2=P0,T(1|t/τT)θ(τT|t|), with θ (x) being the Heavside function.

© 2011 IEEE

PDF Article
More Like This
Optical Nyquist Pulse Generation in Mode-Locked Fibre Laser

Sonia Boscolo, Christophe Finot, and Sergei K. Turitsyn
CI_3_1 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2015

2 ns Pulses from a Fibre Laser Mode-Locked by Carbon Nanotubes

E. J. R. Kelleher, J. C. Travers, Z. Sun, A. G. Rozhin, A. C. Ferrari, S. V. Popov, and J. R. Taylor
CJ10_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2009

Tailored Waveform Generation in Mode-Locked Fiber Lasers by In-Cavity Pulse Shaper

Sonia Boscolo, Christophe Finot, and Periklis Petropoulos
JM5A.49 Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides (BGPP) 2014

Select as filters

Select Topics Cancel
© Copyright 2023 | Optica Publishing Group. All Rights Reserved