Optical limiters using photorefractive nonlinearities

Cronin‐Golomb, Mark; Yariv, Amnon

doi:10.1063/1.335314

Cited by 77 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interference of initially weak scattered beams with the injected beam forms a set of dynamic holographic gratings. Diffraction of the input beam by these holograms leads to enhancement of those scattered waves which satisfy the phase-matching condition (Cronin-Golomb & Yariv, 1985). Due to holographic nature of fanning effect, any fast modulation of the phase of the injected light wave results in a variation of scattered light intensity; so the demodulation signal appears.…”

Section: Spatial Multiplexing Of Dynamic Hologramsmentioning

confidence: 99%

Multi-Channel Adaptive Interferometers Based on Dynamic Hologram Multiplexing

Romashko¹,

Kulchin²

2011

Advanced Holography - Metrology and Imaging

View full text Add to dashboard Cite

Section: Spatial Multiplexing Of Dynamic Hologramsmentioning

confidence: 99%

Multi-Channel Adaptive Interferometers Based on Dynamic Hologram Multiplexing

Romashko¹,

Kulchin²

2011

Advanced Holography - Metrology and Imaging

View full text Add to dashboard Cite

“…On the other hand, phenomenon of beam-fanning has been used in demonstrations of novelty ®ltering [3,7], optical limiting [4], dynamic range compression [5], incoherent-to-coherent conversion [6], feature extraction and pattern recognition [8]. Some of these above mentioned applications use intensitydependent behaviour observed in the growth of beam-fanning.…”

Section: Introductionmentioning

confidence: 99%

Intensity-dependent beam-fanning in high-gain photorefractive barium titanate crystal

Pati

Tripathi

Singh

2001

Journal of Modern Optics

View full text Add to dashboard Cite

A phenomenological multi-wave mixing model has been used along with a more general solution of Kukhtarev's model to explain intensitydependent beam-fanning in photorefractive (PR) BaTiO3 crystal. The variation of trap density owing to the photoexcitation of charge carriers has been considered to explain the intensity-dependent e ect. Theoretical results predicted by the model show a con®rmation with experimental results obtained from PR crystal, and also show some of the controlling mechanisms that enable use of beam-fanning for some potential applications. IntroductionBeam-fanning (or ampli®ed scattered light) is commonly observed while performing experiments with photorefractive (PR) crystals possessing large two-beam coupling coe cients. Such an e ect is more pronouncedly observed in a PR BaTiO3 crystal with 4 mm symmetry while exploiting the largest electro-optic coe cient r42 (820 pm V -1 ). To understand the origin of PR beam-fanning, two accepted and alternative view points have been proposed in the literature [1, 2]. One is based on the fact that symmetric incident light intensity creates a strong asymmetric refractive index change leading to beam distortion. An alternative view attributes beam-fanning to energy coupling between the incident beam and scattered components that originate from the crystal imperfections in the PR crystal. The ampli®ed scattered beams, thereby, produce beam-fanning. Our study uses the above fact to model beam-fanning in PR crystal.The presence of beam-fanning is deleterious to applications involving signal ampli®cation and it is possible to seize its growth and in¯uence by using various mechanisms. On the other hand, phenomenon of beam-fanning has been used in demonstrations of novelty ®ltering [3,7], optical limiting [4], dynamic range compression [5], incoherent-to-coherent conversion [6], feature extraction and pattern recognition [8]. Some of these above mentioned applications use intensitydependent behaviour observed in the growth of beam-fanning.

show abstract

“…Using such induced and erasable SPPC, some logic operations were performed [24] . Fanning can be advantageously employed for applications such as SPPC [12], novelty filtering [25], measurement of birefringence and photoconductivity [26], diode and bistable optical device with erasable memory [12], dynamic range compression [27] and optical limiters [28] .…”

mentioning

confidence: 99%