식각된 불규칙 단면을 갖는 단일모드 광섬유를 이용한 광굴절 체적 홀로그램의 기록

Photorefractive volume hologram recording by single-mode fiber with irregularly etched facet

Volume hologram was recorded using reference beam form optical fiber taper. A singel mode fiber was chemically etced to make a taper structure, and we showed experimentally that the referencing by the irregular beam pattern from this taper structure could increase the storage density of photorefractive volume hologram. The spatial selectivity of the volume hologram with this method was increased by two times compared to the normal single mode fiber referencing case. A theoretical analysis with randomly phased plane model also confirmed the results.