Narrow Band Pass Filter
Abundant experiences of customized optical filters for the optical communication and fiber-optic sensing have expanded the variation of the bandpass filters:
・1 cavity type – 5 cavity type are selectable.
・Narrow band width ― FWHM < 1nm ― is available
Wider Band Pass Filter
Koshin’s remarkable design technology enable the bandpass filters to move over 10nm maintaining the wider FWHM.
・Small variation of FWHM.
・Very few ripple generation.
Wide Tuning Range Filter
Very wide tuning range realizes the custom bandpass filter that can change both the center wavelength and the FWHM. (when used in the WTFM)