Schematic of MIR-OCT system. Letter abbreviations in the figure are as follows: A, attenuator; BS, beam splitter; DAQ, data acquisition card; LA, lock-in amplifier; LNC, liquid nitrogen cryostat; M, mirror; MCT, mercury cadmium telluride detector; PA, preamplifier; PC, personal computer; PG, high voltage pulse generator; PM, 90° off-axis paraboloid mirror; QCL, quantum cascade laser; S, sample; and TS, translation stage.
(a) Low temperature high resolution emission spectrum of the long and wide broadband QC laser ridge operating in pulsed mode ( pulse duration), with repetition rate of and current density of . (b) Corresponding interferogram.
(a) OCT Image of a window. (b) Interference envelope of one of the constituent depth scans. (c) Deconvolved OCT Image of a window. (d) Deconvolved depth scan.
(a) SEM image of 3D collagen lattice at magnification. (b) SEM image of 3D collagen lattices at magnification. (c) Surface topography as measured with mid-infrared OCT system. In (a), (b), and (c) the direction corresponds to the long axis of the spiral lattice.
(a) Interference envelope from axial depth scan of uncoated 3D collagen lattice mounted on double sided sticky tape. (b) Deconvolved axial depth scan.
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