We model 8-fold photonic quasi-crystal fiber (PQF) for computing the relative efficiency of second harmonic generation (SHG). Analysis shows 15% increment in SHG relative efficiency in 8-fold (72.36%W-1cm-2) compared to 6-fold (62.96 % W-1cm-2) PQF. © 2013 IEEE.

Senthilnathan K

Department of Physics

School of Advanced Sciences

Vellore Campus

Sivabalan S

Department of Instrumentation

School of Electrical Engineering

Bhattacharjee R

Babu P.R

Nakkeeran K.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Designing an Eight-fold Photonic Quasi-crystal Fiber for Enhancing the Efficiency of Second Harmonic Generation

Workshop on Recent Advances in Photonics (WRAP)

In this paper, we explore the possibility of using a new type of microstructured optical fiber called photonic quasi-crystal fiber (PQF) for enhancing the efficiency of second harmonic generation (SHG). We model a six-fold, index guided, silica core PQF with a relative air hole diameter ranging from 0.1–0.5. We compute the various factors related to SHG, namely, phase mismatch factor, wave-vector mismatch, coherence length, quasi-phase matching length and overlap area. Of the various factors, we focus more on the role of wave-vector mismatch and overlap area as these parameters are highly sensitive to the variations in the geometrical arrangement of air holes in the cladding. Further, these parameters are required to be as minimum as possible for enhancing the efficiency of SHG. We find that the wave-vector mismatch factor does decrease for higher values of pitch and for lower values of relative air hole diameter. However, the overlap area increases for higher values of pitch and for lower values of relative air hole diameter. Therefore, we optimize the hitherto mentioned parameters such that the wave-vector mismatch is 0.145&nbsp;μm−1 and the overlap area is 3.48&nbsp;μm2. With these values, we demonstrate a relative efficiency of 62.96%&nbsp;W−1&nbsp;cm−2 with the proposed PQF.

Optical Materials

Exploring a photonic quasi-crystal fiber for enhancing the efficiency of second harmonic generation: Modeling and analysis

Optics Letters

Validity of the V parameter for photonic quasi-crystal fibers

Tuning quadratic nonlinear photonic crystal fibers for zero group-velocity mismatch

IEEE Photonics Technology Letters

Broad-band second-harmonic generation in holey optical fibers

Nonlinear Guided Waves and Their Applications

Experimental study of thermal poling in holey fibres

Designing an eight-fold photonic quasi-crystal fiber for enhancing the efficiency of second harmonic generation

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