Coherent narrow-band light source for miniature endoscopes

Zhan-Yu Chen, Ankur Gogoi, Shao-Yu Lee, Yuan Tsai-Lin, Po-Wei Yi, Ming-Kuan Lu, Chih-Cheng Hsieh, Jinchang Ren, Stephen Marshall, Fu-Jen kao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
110 Downloads (Pure)


In this work, we report the successful implementation of a coherent narrow-band light source for miniature endoscopy applications. An RGB laser module that provides much higher luminosity than traditional incoherent white light sources is used for illumination, taking advantages of the laser light's high spatial coherence for efficient light coupling. Notably, the narrow spectral band of the laser light sources also enables spectrally resolved imaging, to distinguish certain biological tissues or components. A monochrome CMOS camera is employed to synchronize with the time lapsed RGB laser module illumination for color image acquisition and reconstruction, which provides better spatial resolution than a color CMOS camera of comparable pixel number, in addition to spectral resolving.

Original languageEnglish
Article number7100707
Number of pages7
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number1
Early online date15 May 2018
Publication statusPublished - 28 Feb 2019


  • image colour analysis
  • endoscopes
  • light sources
  • cameras
  • optical fibers
  • monochrome CMOS


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