Tunable optical instruments
A technology of optical instruments and photodetectors, applied in scientific instruments, instruments, optics, etc., can solve the problems of OSA and OCM being bulky, expensive, and slow to adjust.
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[0054] The present invention may be better understood after reading the following detailed description of aspects of various embodiments of the invention when read in conjunction with the accompanying drawings.
[0055] Tunable thin-film filters (TTFFs) are free-space filters that allow light beams, such as collimated light, to enter and filter out a wavelength or set of wavelengths for transmission or reflection. The light beam to be filtered is not guided by waveguides except for the input and output optics which extract the beam from or inject the beam into the waveguide, like an optical fiber.
[0056] exist figure 1 Shown in is a block diagram of an optical instrument 100 including a TTFF 101, such as an OSA or OCM. The TTFF 101 contains semiconductor thin films with large thermo-optic coefficients, resulting in wide tunability without the need for moving parts. Integrated or closely associated with the TTFF 101 are means to heat and / or cool the filter over a wide tempe...
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