Micro-channel device for spectrum measurement using optical fiber aligned with bias spring with reversely tapered profile

The micro-channel device for passing the supercontinuum light across the liquid channel is developed. For the accurate alignment of the optical fibers, the bias spring with the reversely tapered profile is newly introduced realizing the high transmission ratio. Infra-red absorption spectrum is measured for obtaining the molecular information. When the water is introduced in the liquid channel, the characteristic absorption peak is clearly confirmed.