Mechanism transition of self-pumped phase conjugation in KTa1 −xNbxO3:Fe crystals
| ISSN: |
1432-0649
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| Keywords: |
42.65.-k
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract Mechanism transitions of Self-Pumped Phase Conjugation (SPPC) with wavelength and doping concentration are observed in KTN:Fe (KTa1 −x Nb x O3:Fe with x = 0.48) crystals. The SPPC mechanism in KTN: Fe (0.4 wt. %) crystal transforms from “Stimulated Photorefractive Backscattering and Four-Wave Mixing” (SPB-FWM) to “cat” (or total internal reflection) as the wavelength increases from 514.5 nm to 620 nm. SPPC at 514.5 nm is formed with the “cat” mechanism in a 0.2 wt. % doped KTN:Fe crystal, while with the SPB-FWM mechanism in a 0.4 wt. % doped one. These mechanism transitions are discussed with respect to the dependence of the backscattering gain coefficient of the crystals on wavelength and doping concentration.
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| Type of Medium: |
Electronic Resource
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| URL: |