Generation of a Train of Ultrashort Pulses Near-Infrared Regime in a Tapered Photonic Crystal Fiber Using Raised-Cosine Pulses

Samuel Olufemi Olupitan, K. Senthilnathan, P Ramesh Babu, Sumeet Sunil Aphale, Nakkeeran Kaliyaperumal

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We consider an optical pulse propagating in a tapered photonic crystal fiber (PCF) wherein dispersion as well as nonlinearity varies along the propagation direction. The generalized nonlinear Schrödinger equation aptly models the pulse propagation in such a PCF. The design of the tapered PCF is based on the analytical results, which demand that the dispersion decrease exponentially and the nonlinearity increase exponentially. In this paper, we adopt the generalized projection operator method for deriving the pulse-parameter equations of the Lagrangian variation method and the collective variable method. Besides, we consider another pulse profile called raised cosine (RC), which is aimed at replacing the conventional hyperbolic secant pulse. From the detailed results, we infer that the initial RC pulse evolves into a hyperbolic secant pulse. Further, in order to minimize the input power requirement, we employ the idea of replacing the solid core in the PCF with chloroform. In addition to the single pulse compression, we also investigate the possibility of multisoliton pulse compression. Here, we consider eight chirped hyperbolic secant pulses as input and generate a train of ultrashort pulses at 850 nm based on the chirped multisoliton pulse compression. In a similar way, we extend this pulse compression with eight RC pulses.
Original languageEnglish
Pages (from-to)1420 - 1437
Number of pages17
JournalIEEE Photonics Journal
Volume4
Issue number5
DOIs
Publication statusPublished - Oct 2012

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Pulse compression
Photonic crystal fibers
Ultrashort pulses
Laser pulses
photonics
Infrared radiation
fibers
pulses
pulse compression
crystals
Chlorine compounds
Nonlinear equations
nonlinearity
calculus of variations
propagation
chloroform
nonlinear equations
projection
operators
requirements

Keywords

  • chirp
  • dispersion
  • educational institutions
  • equations
  • optical pulse generation
  • photonic crystal fibers
  • solitons

Cite this

Generation of a Train of Ultrashort Pulses Near-Infrared Regime in a Tapered Photonic Crystal Fiber Using Raised-Cosine Pulses. / Olupitan, Samuel Olufemi; Senthilnathan, K.; Ramesh Babu, P; Aphale, Sumeet Sunil; Kaliyaperumal, Nakkeeran.

In: IEEE Photonics Journal, Vol. 4, No. 5, 10.2012, p. 1420 - 1437.

Research output: Contribution to journalArticle

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