Graded-reflectivity mirror based on a volume phase hologram in a photopolymer film

Graded-reflectivity mirrors for 1064-nm wavelength have been fabricated by use of volume phase holograms recorded in photopolymer films. A method for producing such holograms for the 1064-nm radiation by use of a 532-nm light source with a short (0.1-mm) coherence length was developed. The measured peak reflectivity of the mirror reached 95%, and its super-Gaussian profile well matched that calculated based on coupled-mode theory. The mirror can withstand a peak power density greater than 10(8) W/cm(2). This method can also be used for fabricating deflectors that direct an incident beam to any specified angle other than the angle of reflection. (C) 1998 Optical Society of America. OCIS codes: 090.1970, 090.2890, 230.4040, 050.7330, 160.2900, 230.1480.