Broad bandwidth and 600 μm length photonic crystal fiber polarization filter at the communication window of 1.55 μm

Zhen Zhang; Shu-guang Li; Qiang Liu; Shuhuan Zhang; Yujun Wang; Junjun Wu

doi:10.1117/1.OE.57.2.027105

19 February 2018 Broad bandwidth and 600 μm length photonic crystal fiber polarization filter at the communication window of 1.55 μm

Zhen Zhang, Shu-guang Li, Qiang Liu, Shuhuan Zhang, Yujun Wang, Junjun Wu

Author Affiliations +

Optical Engineering, Vol. 57, Issue 2, 027105 (February 2018). https://doi.org/10.1117/1.OE.57.2.027105

Abstract

A broad bandwidth and 600-μm length photonic crystal fiber polarization filter at the communication window of 1.55 μm is proposed. The physical parameters are analyzed by the finite element method. In the structure, the loss is 705.81 dB/cm for y-polarized mode and 24.06 dB/cm for x-polarized mode at the wavelength of 1.55 μm; the y-polarized mode will be filtered out because of this property. The bandwidth of an extinction ratio (ER) better than −20 dB is 65 nm when the filter length is 600 μm, and the ER is −41 dB at the communication wavelength of 1.55 μm. The filter structure is simple and easy to produce, and it can be used to produce a single-polarization filter.

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Zhen Zhang, Shu-guang Li, Qiang Liu, Shuhuan Zhang, Yujun Wang, and Junjun Wu "Broad bandwidth and 600 μm length photonic crystal fiber polarization filter at the communication window of 1.55 μm," Optical Engineering 57(2), 027105 (19 February 2018). https://doi.org/10.1117/1.OE.57.2.027105

Received: 4 September 2017; Accepted: 3 January 2018; Published: 19 February 2018

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KEYWORDS

Polarization

Optical filters

Photonic crystal fibers

Gold

Refractive index

Metals

Finite element methods

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