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МODANS
holographic optical elements to select modes of laser light

Purpose:
1. Ф1. Generation of reference modal beams
2. Mode phase correction
3. Studies of transverse mode structure
4. Power redistribution between beam modesке

6-beam modan (photomask)
Carrier frequency = 20 lines/mm
Modes: (p,l)=(0,0),(1,0), (2,0),(3,0),(0,1),(0,2)
Coding frequency = 40 lines/mm

Gauss-Laguerre modes

(0,0) (1,0)

(2,0) (0,2)

Applications:
- fiber-optical sensor
- mode multiplexing in fiber-optic communications.

Publications:
1. O1. Optics and Lasers in Engineering, 1991, v.15, N 5, pp.341-356.
2. Computer Optics, Pergamon Press, 1990, v.2, N 2, pp. 109-113.
3. Soifer V.A., Golub M.A. Laser beam mode selection by computer generated holograms. - Boca Raton: CRC Press,1994. - 256p.

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