Characteristics of novel long-period fiber gratings written by focused high-frequency CO2 laser pulses

Yun-Jiang Rao; Yi-Ping Wang; Zeng-Lin Ran; Tao Zhu; Ban-Mei Yu

doi:10.1117/12.445056

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17 October 2001 Characteristics of novel long-period fiber gratings written by focused high-frequency CO₂laser pulses

Yun-Jiang Rao, Yi-Ping Wang, Zeng-Lin Ran, Tao Zhu, Ban-Mei Yu

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Proceedings Volume 4581, Passive Components and Transmission Systems; (2001) https://doi.org/10.1117/12.445056
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

In this paper, we report novel long-period fiber gratings (LPFGs) fabricated by using an improved CO₂ exposure method, which is based on the thermal shock effect of high-frequency CO₂ laser pulses at several kHz. Compared with the method using low-frequency laser pulses at several Hz reported previously, this new technique is more effective due to the significant increase in the transient laser energy density focused on the fibre, which is likely to cause larger densification and residual stress relief and hence larger refractive index change in the fibre. The optical and mechanical characteristics of such a type of LPFGs have been studied by experiment.

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Yun-Jiang Rao, Yi-Ping Wang, Zeng-Lin Ran, Tao Zhu, and Ban-Mei Yu "Characteristics of novel long-period fiber gratings written by focused high-frequency CO₂laser pulses", Proc. SPIE 4581, Passive Components and Transmission Systems, (17 October 2001); https://doi.org/10.1117/12.445056

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