San-In Instrument Co., Ltd. imports and sells optical communication and laser products utilizing advanced technology as an agent from various countries around the world. ■ Laser oscillators (femtosecond lasers/picosecond lasers/nanosecond lasers/CW lasers/wavelength-tunable lasers/narrow linewidth lasers, etc.) ■ Optical communication equipment (transceivers/optical amplifiers/WDM/couplers, etc.) ■ Sensing-related (various optical detectors) ■ Spectroscopy-related (spectrometers/optical fiber probes/hyperspectral cameras, etc.) ■ Optical systems (IBS-coated optical systems/super high vacuum windows/retroreflectors, etc.)