Mega-9
Advanced optical narrow bandpass
filter and beam splitter cubes
565nm narrow bandpass filter,FWHM:40nm
Price:$100(FOB Shanghai)
Store:1 pcs 
Size:Ø25.7*6mm
CWL:565nm
FWHM:40nm
Type: narrow bandpass filter
Specifications:
Substrate material: Float glass
Dimension(mm):11.4x11.4,Ø12.5x6(mounted),Ø25.4x6(mounted),Custom
Angle of incidence:0 degree
Center wavelength:565 nm
FWHM:40 nm
Tpeak: T>80% at 565 nm
Blocking: OD5-A What is OD?
Min. clear aperture(mm): >11x11(11.4x11.4),>Ø8.7(v12.7),>Ø21(Ø25.4)
Other: Customed,Store id: CP1-3-1
Note: Other dimension and specification are available upon request.
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Mega-9 Optical supplies advanced narrow bandpass filter with high quality and fast delivery.
An optical filter, including a pair of Bragg grating units optically coupled to respective ports of a circulator, is provided for filtering a selected wavelength band of light from a DWDM input light. Each grating unit includes a respective tunable optical element, which have a reflective element, such as a Bragg grating. Generally, one grating unit filters a selected wavelength band of light and reflects the selected wavelength band to the other grating unit, which reflects a portion of the reflected wavelength band to an output of the optical filter. This double reflection of the selected wavelength band provides an optical filter having an effective filter function that is equal to the product of the individual filter functions of the grating units. To create a desired effective filter function, the gratings may be written to have different filter functions or grating profiles. One or both of the grating units may also be tunable to selectively create, tailor, shape or change the effective filter function of the optical filter in response to a control signal by offsetting the reflection wavelengths of the gratings, having different grating profiles.1. An optical filter comprising: a first optical element including a first reflective element for receiving light and reflecting a first wavelength band of the light centered at a first reflective wavelength, the first reflective element characterized by a first reflective filter function; and a second optical element, optically connected to the first a second optical element to receive the reflected first wavelength band of the light, including a second reflective element for reflecting a second wavelength band of the light centered at a second reflection wavelength, the second reflective element characterized by a second reflective filter function, whereby at least one of the first reflective filter function and the second reflective filter function is not substantially flat over a substantial portion of the respective first or second reflective filter function, and the first wavelength band and the second wavelength band overlap spectrally.
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