Numerical simulation on spectral compression of frequency-shifting femtosecond pulses in photonic crystal fiber

S. N. Li; H. P. Li; Q. M. Wang; J. K. Liao; X. G. Tang; Y. Liu; Y. Z. Liu

doi:10.1117/12.906297

5 December 2011 Numerical simulation on spectral compression of frequency-shifting femtosecond pulses in photonic crystal fiber

S. N. Li, H. P. Li, Q. M. Wang, J. K. Liao, X. G. Tang, Y. Liu, Y. Z. Liu

Author Affiliations +

Proceedings Volume 8198, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration; 81980O (2011) https://doi.org/10.1117/12.906297
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

We present a numerical investigation of nonlinear propagation of femtosecond pulses in photonic crystal fibers (PCFs) by solving the generalized nonlinear Schrodinger equation. The PCFs have a second-order dispersion of -48 ps²/km, nonlinear coefficient of 115 W^-1km^-1, and third-order dispersion (TOD) ranging from 0.1 ps³/km to 1 ps³/km at 1550-nm wavelength. The simulation results show that efficient spectral compression of ultrashort pulses can be induced in the regime of soliton self-frequency shift (SSFS) in PCFs when the input pulse parameters satisfy the condition 0.9 ≤N ≤ 1.2 for the soliton order N. It is found that the output spectral width is dependent on the peak power of input pulse and the PCF length. A spectral-compression factor up to 2.2 can be achieved for 50-fs, 1550-nm solitons propagating through 10-m PCF with a TOD of 0.5 ps³/km, where the soliton wavelength shifted from 1550 nm to 1698 nm. The effect of initial pulse chirp on output spectral width can be negligible for large PCF length. Greater spectral-compression factor can be obtained using PCF with larger TOD value. This SSFS-based spectral-compression scheme offers much promise for generation of narrow line-width tunable light sources in photonic applications.

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S. N. Li, H. P. Li, Q. M. Wang, J. K. Liao, X. G. Tang, Y. Liu, and Y. Z. Liu "Numerical simulation on spectral compression of frequency-shifting femtosecond pulses in photonic crystal fiber", Proc. SPIE 8198, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 81980O (5 December 2011); https://doi.org/10.1117/12.906297

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