• Acta Optica Sinica
  • Vol. 34, Issue 5, 506001 (2014)
Chen Chao1、*, Yang Xianhui2, Wang Chuang3, and Yu Yongsen1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    DOI: 10.3788/aos201434.0506001 Cite this Article Set citation alerts
    Chen Chao, Yang Xianhui, Wang Chuang, Yu Yongsen. High-Order Tilted Fiber Bragg Gratings Carved with Femtosecond Laser[J]. Acta Optica Sinica, 2014, 34(5): 506001 Copy Citation Text show less

    Abstract

    High-order tilted fiber Bragg gratings (HO-TFBG) in non-photosensitized single mode fiber are demonstrated with femtosecond laser micro-nano machining technique. To realize the tilted refractive index modulation in fiber core and partial cladding, a high order phase mask is used to generate periodic light intensity which is focused on to the tilted fiber with a lateral scanning. Using this method, three groups of cladding mode resonances in relation with high order Bragg resonance are detected in the wavelength range from 1200 nm to 1700 nm. Thus it carries more informations compared with ultraviolet tilted fiber Bragg gratings (UV-TFBG), especially in multi-parameters monitoring. The refractive index, axial strain and temperature sensing characteristics of the HO-TFBG are also studied. Besides, due to the femtosecond laser material modification, this device shows a good ability in high temperature stability, which has potention in chemical and physical sensing in harsh circumstances.
    Chen Chao, Yang Xianhui, Wang Chuang, Yu Yongsen. High-Order Tilted Fiber Bragg Gratings Carved with Femtosecond Laser[J]. Acta Optica Sinica, 2014, 34(5): 506001
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