Alignment of a birefringent fiber Sagnac interferometer by fiber twist
1999; Elsevier BV; Volume: 160; Issue: 1-3 Linguagem: Inglês
10.1016/s0030-4018(98)00638-5
ISSN1873-0310
AutoresE. A. Kuzin, H Cerecedo Núñez, N. Korneev,
Tópico(s)Advanced Fiber Laser Technologies
ResumoAbstract We have shown that the Sagnac interferometer (SI) consisting of a coupler with output ports connected by high-birefringent fiber can be ideally adjusted by twisting the fiber at the output ports even though the coupler has birefringence. We used numerical simulations and experiments on a coupler with weak birefringence to show that the SI can be adjusted for any mutual orientation of the high-birefringent fiber and coupler port principal axes. This provides the simplest and the cheapest procedure of fabrication and adjustment of wavelength-division multiplexers and sensors based on the SI fabricated from a high-birefringent fiber and a non-polarization preserving directional coupler.
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