Optical Coherence Tomography(OCT) / Spectrometer for SD-OCT / Raman Spectrometer / Compact Spectrometer / Volume Phase Holographic(VPH) Gratings / Laser Diode / narrow band Laser Diode / Single Mode(SM) Laser Diode / Raman Laser Diode / Raman Notch Filter / Raman ASE Filter / Raman Beam Splitter /THz-Raman module / High speed Focusing Control MEMS mirror / Adaptive Optics MEMS mirror / Fiber Laser / semi-order Fiber / low incidence-loss processing for Fiber Edge