| 摘要 |
A technique for optical coherence tomography is provided. As to a device aspect of the technique, a device (100b) comprises a light generator (110), a dispersive medium (120), an optical coupler (130) and a detector (140). The light generator is adapted to generate a series of input pulses (202, 204, 206) of coherent light, each input pulse of the series having an input pulse width (tau0). The dispersive medium has an input (122) that is optically coupled to the light generator and an output (124) for output pulses (302, 304, 306). The dispersive medium is adapted to stretch the input pulse width to an output pulse width (taup) of each of the output pulses by means of chromatic dispersion. The optical coupler is adapted to couple the output pulses from the output into a reference arm (160) and into a sample arm (170). The optical coupler is further adapted to superimpose light returning from the reference arm and from the sample arm. The detector is adapted to detect an intensity of interference of the superimposed light with a temporal resolution of a fraction (deltatgate) of the output pulse width. |
