INFRARED SINGLE-MODE FIBEROPTIC FOURIER-TRANSFORM SPECTROMETRY AND DOUBLE FOURIER INTERFEROMETRY

An infrared single-mode fiber-optic Fourier-transform spectrometer con structed for the demonstration of the technique is described, in which beam splitting and beam combining are performed with fiber-optic dire ctional couplers and the optical path difference scan is generated by stretching fibers. Experiments done with this fiber-optic Fourier-tran sform spectrometer are presented. A spectral resolution of 1328 at 2.2 mu m can be achieved. The experimental results show,the feasibility o f fiber-optic Fourier-transform spectrometry and double Fourier interf erometry. (C) 1996 Optical Society of America