Ultra-compact Acousto-Optic Modulator of a Fibre Bragg Grating in a Highly Birefringent Suspended Core Fibre
MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES VII(2021)
摘要
Highly efficient and compact acousto-optic modulator of a fibre Bragg grating is reported for the first time. The device is composed of millimetre scaled components and a 1 cm grating inscribed in a four air holes birefringent suspended core fibre. The reflection of the orthogonal polarization modes is tuned by a sinusoidal electrical signal at the resonance frequency of 469 kHz. A significant modulation depth of 45% is achieved at a maximum drive voltage of 10 V. The demonstrated 4 cm long all-fibre modulator is 60% shorter compared to previous similar setups, indicating new possibilities for stable and fast switching of fibre-integrated photonic devices.
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关键词
acousto-optic modulator,fibre Bragg grating,birefringent suspended core fibre
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