OHRM11639 is a multi-channel fiber spectrometer designed based on the XSM11639 combination for narrow linewidth applications, which can support up to 7 channels. The spectrometer is equipped with a Hamamatsu Photon high-sensitivity linear array CMOS image sensor S11639, which, together with a 16 bit A/D sampling module, provides excellent spectral signal response and an extremely wide response range for the spectrometer. At the same time, the streamlined and compact structural design and stable circuit design ensure that XS11639 has excellent spectral resolution, signal-to-noise ratio, and temperature stability.