Self-starting phase conjugation

Fig. 3 Experimental setup for observing self-starting phase conjugation effect. Insert shows the wave-vector matching diagram.

The observed dynamics of the self-starting phase conjugation process is governed by the optical nonlinearity and scattered noise amplitude [27], as well as the thermal grating build up time. Both the onset time and build up times are shortened as the input pump power is increased. The total time it takes for the signal to build up to the maximum can be as short as 0.5 ms, at a pump power of about 800 mWatt. These shortenings of the build up and onset times have also been observed as the sample temperature is increased towards T [25]. 

I. C. Khoo, "Self-Starting Phase Conjugation with Liquid Crystal," lEEE-Lasers and Electro-Optics Society Technical Meeting, San Jose, CA (November 1993). I. C. Khoo and Yu Liang, (to be published). 

Khoo, I. C. and Y. Liang, 1995. Observation of stimulated orientational scattering and cross-polarized self-starting phase-conjugation in a nematic liquid-crystal film. Opt Lett. 20 130-132. 

SELF-STARTING OPTICAL PHASE CONJUGATION (SSOPC)... 

I. C. Khoo, Hong Li and Yu Liang, "Self-Starting Optical Phase Conjugation in Dyed Nematic Liquid Crystal with Stimulated Thermal Scattering Effect," Opt. Letters, 18i. p. 3 (1993). 

Khoo, I. C., H. Li, and Y. Liang. 1993. Self-starting optical phase conjugation in dyed nematic liquid crystals with a stimulated thermal-scattering effect. Opt. Lett. 18 1490. 

As in most self-starting optical phase conjugation originating from speckle noise, " the onset dynamics of the signal consist of two regimes an onset time r and... 

Figure 12.15. Typical dynamics of self-starting optical phase conjugation process.

Figure 12.19. Schematic depiction of experimental set up used to demonstrate associative memory with self-starting optical phase conjugation, where a complete image is reconstructed from partial input data (78).

---