Generation of phase conjugate waves in dichromated gelatin and related materials

Goureesh M. Naik; Sastry V. Pappu

doi:10.1364/AO.30.001890

Applied Optics
Vol. 30,
Issue 15,
pp. 1890-1892
(1991)
•https://doi.org/10.1364/AO.30.001890

Generation of phase conjugate waves in dichromated gelatin and related materials

Goureesh M. Naik and Sastry V. Pappu

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Goureesh M. Naik and Sastry V. Pappu, "Generation of phase conjugate waves in dichromated gelatin and related materials," Appl. Opt. 30, 1890-1892 (1991)

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Abstract

Evidence is reported, we believe for the first time, on the generation of phase conjugate waves in dichromated gelatin, methylene blue doped gelatin, and methylene blue doped dichromated gelatin.

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Item	Description
Methylene blue doped gelatin (MBG)	(a) Soak 3 g of gelatin in 100 mliter of distilled water and heat the solution for 10 min at 50° so as to dissolve the gelatin completely, (b) Add 0.03 g of methylene blue and stir until it dissolves, (c) Pipet out 1 mliter of the solution and spread it on a clean glass plate using a 40-mm diam glass ring and the gravity settling technique, (d) Dry the coated plates overnight in a <40% humidity environment.
Dichromated gelatin (DCG)	(a) Add 0.015 g of ammonium dichromatea in step (a) of MBG. (b) Coat the glass plate with this solution as in steps gelatin (c) and (d) of MBG, (c) Dip the plate in Kodak rapid fixera for 10 min and then dry the plate after washing for 20 min in deionized water, (d) Bakea the plate thus prepared for 2 h at 150°C. (e) Sensitize the plates for 5 min in a 5% wt/vol solution of ammonium dichrornate, (f) Dry the coated plate as in step (d) of MBG.
Methylene blue doped dichromated gelatin (MBDCG)	(a) Repeat steps (a)–(d) of DCG. (b) Prepare a sensitizer solution with dichromated gelatin 3% wt/vol of ammonium dichro (MBDCG) mate and add 0.03 g of methylene blue while maintaining the pH of the solution around 9. (c) Soak the gelatin coated plate for 10 min in the sensitizer solution thus pre pared. (d) Dry the plate as in step (d) (MBG).

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Applied Optics