Parametric amplification in tapered photonic crystal fibers with longitudinally decreasing zero-dispersion wavelength

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• 作者：Hassan Pakarzadeh ; ^{pakarzadeh@sutech.ac.ir" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Parametric amplification ; Photonic crystal fiber ; Tapered fiber ; Zero-dispersion wavelength ; Gain spectrum
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：126
• 期：24
• 页码：5509-5512
• 全文大小：1162 K

文摘

In this paper, we investigate for the first time the parametric amplification in photonic crystal fibers (PCFs) with a continuously-decreasing zero-dispersion wavelength along their length. The use of these tapered PCFs leads to the reduction of the length required for obtaining a high parametric gain. Simulation results show that although the gain is significantly increased in such tapered PCFs, the gain bandwidth is considerably decreased in comparison with that of un-tapered PCFs. Also, the flatness of the gain spectrum in such tapered PCFs is quickly decreased with the increase of the input pump power. A unique feature of the tapered PCFs is that their parametric gain spectrum exhibits no dependency on the pump wavelength which is in contrast to un-tapered PCFs. In addition, the saturation behavior of tapered PCFs is totally different from that of the un-tapered PCF.