Splice of photonic crystal fibres by use of double phase-conjugate mirror

We present a novel splicing method for photonic crystal fibres (PCFs) with a double phase-conjugate mirror (DPCM). The DPCM is an optical device with photorefractive crystal (PRC) which generates phase-conjugate beams easily. In this report, we experimentally measure the splice losses of the DPCM for transverse PCF offset. We numerically estimate the splice losses in the case that butt coupled PCFs without DPCM. Comparing the experimental and numerical values of the splice loss of PCFs, we discuss the tolerance of the DPCM for the PCF displacement. Also, we discuss the causes of loss inside the DPCM module.