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Sandwiched long-period fiber grating filter based on periodic SU8-thick photoresist technique

机译:基于周期性SU8厚光刻胶技术的夹心式长周期光纤光栅滤波器

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摘要

A loss-tunable sandwiched long-period fiber grating (SLPFG) filter is proposed in this Letter. This SLPFG utilized thick SU8 photoresist layers to induce refractive index modulations, and ultrahigh period precision was hence achieved. The external force required to tune this SLPFG filter is about 0.3942 Nwith the deepest loss attenuation 31.29 dBat 1534 nmwavelength. This process not only improves the overall performance of traditional long period fiber grating but also cuts down the facility cost by 50%. The proposed SLPFG has great potential for low-cost and compact force transducer applications.
机译:在这封信中提出了一种损耗可调的三明治式长周期光纤光栅(SLPFG)滤波器。该SLPFG利用厚的SU8光致抗蚀剂层来诱导折射率调制,因此实现了超高的周期精度。调谐此SLPFG滤波器所需的外力约为0.3942 N,在1534 nm波长处的损耗衰减最大,为31.29 dB。该工艺不仅提高了传统长周期光纤光栅的整体性能,而且将设备成本降低了50%。所提出的SLPFG在低成本和紧凑型力传感器应用中具有巨大的潜力。

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