Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Topical Meeting on Optical Bistability (OB)

Optical Bistability and Hysteresis under Phase Conjugation in CdS Crystal

Brodin, Anatoly A. Borshch, V.I. Volkov, N.V. Kukhtarev

Published Jan 1, 1983• 0 citations
Publisher

Abstract

The exact solution of the nonlinear equations, describing phase conjugation (PC) was obtained. Theoretical dependence of the backward wave intensity on that of interacting waves with Gaussian time shape exhibits well-pronounced hysteresis, which causes the bistable operation when total pump intensity exeeds some critical value Icr. Several hysteresis loops are expected to appear with further increase of pumping.

DOI
10.1364/obi.1983.fb1

Related papers

Optical hysteresis and bistability in phase conjugation by degenerate six-photon mixing

Anatoly A. Borshch, М. С. Бродин, V. I. Volkov +2 more

The exact solution of the nonlinear phase-conjugation equations in the case of fifth-order nonlinearity is presented. The theoretical dependence of the backward-wave intensity on that of the interacting waves with Gaussian time shape exhibit well-pronounced hysteresis that is in agreement with experimental results performed on CdS crystals (nanosecond laser pulses). The physical nature of the phenomenon is discussed using the concept of scattering diagrams in terms of dynamic holography.

Journal of the Optical Society of America A•Jan 1, 1984•10 citations

Optical bistability and hysteresis in a reversed wave in the course of degenerate six-photon interaction in cadmium sulfide

Anatoly A. Borshch, М. С. Бродин, V. I. Volkov +1 more

Nonresonator optical bistability and hysteresis in a wave with a reversed wavefront were observed for the first time because of degenerate six-photon scattering in a CdS crystal. The observations were interpreted theoretically and a forecast was made of the conditions for the observation of these effects in a medium with a nonlinearity of fifth order in respect of the field.

Soviet Journal of Quantum Electronics•Jun 30, 1981•5 citations

Phase conjugate resonators and bistabilities in BaTiO3

Mostafa Dokhanian, Putcha Venkateswarlu, P. Chandra Sekhar

We report our observations of optical bistabilities and hysteresis1 in photorefractive passive phase conjugate resonators with BaTiO3, caused by grating erasure effects between two resonators in three different configurations. Bistable oscillations have been observed between two semilinear oscillators, two ring resonators, and also between a ring and a semilinear resonator. In the experimental arrangement used for bistability studies, a single-mode argon ion laser beam (4880 Å) entered the crystal in a face appropriate for self-pumped phase conjugation. However, the orientation is kept in such a way that no self-pumped phase conjugation is observable if none of the resonators is in operation. In this geometry, bistability and hysteresis were observed in the signal intensity of one resonator as the reflectivity of the variable beam reflector in the second resonator was increased and then decreased in a cycle. Bistability was also seen in the signal intensity of a single resonator as a function of the reflectivity of the external mirror.

Annual Meeting Optical Society of America•Jan 1, 1991•0 citations

Optical hysteresis and bistability in the wave-front conjugation by electrooptic crystals

N.V. Kukhtarev, T. I. Semenets, Vyacheslav N. Starkov

Analitical and numerical investigation of the wave-front conjugation in electrooptic crystals (LiNbO3, BaTiO3, SBN) show that noncavity optical bistability and hysteresis /1,2/ depends on the dominant mechanism of nonlinear responce (diffusion or drift) as on the orientation of the crystal C axis, and is strongly influensed by absorption or gain. Calculation show that critical effects may be observed for crystal length 0.1 cm (SBN, BaTiO3) and 1.5 cm (LiNbO3) for the optimal experimental geometry.

Topical Meeting on Optical Bistability (OB)•Jan 1, 1983•0 citations

Optical Bistability in CdS

Claus F. Klingshirn, F. Fidorra, J.-Y. Bigot +3 more

Optical bistability (ob) is investigated in CdS in a wide range of intensities. Under pulsed excitation (total pulse width 20 nsec) we find at 5K for ħωexc ≈ 2.550 eV on the flank of the AΓ5 exciton ob of the induced absorption type for incident intensities of Iexc ≈ 1kW/cm2. The nonlinearity is in this case a collision-broadening of the free exciton resonance [1]. The commutation times τ↓ and τ↑ are about 1 nsec and 5 nsec, respectively. For ħωexc ≈ 2.546 eV we observe absorptive ob due to the formation of an electron-hole plasma [2] for Iexc ≈ 1MW/cm2. Single shot experiments show τ↓ ≲ 500 psec being thus to our knowledge one of the shortest commutation times reported for single beam ob so far. The observed hysteresis loops are compared to model calculations with variable pulse lengths. The comparison indicates true ob in our experiments.

Topical Meeting on Optical Bistability (OB)•Jan 1, 1985•0 citations

Optical bistability in nonlinear long period fiber grating

Vishal Jain, Santosh Pawar, SHUBHADA KUMBHAJ +1 more

The nonlinear phenomena of optical bistablity is investigated analytically in chalcogenide glass long period fiber grating. Using the basic sets of nonlinear coupled mode equation the expression for the transmittivity of grating has been derived under nonlinear Kerr regime. To examine the bistable charateristics of the grating, the operating wavelength is considerd slightly above the resonance wavelength of 1550 nm i.e. for off resonance condition where detuning parameter δ≠0. It is observed that the intensity of the transmitted wave increases with increasing input intensity and reaches its maximum value at particular intensity. On gradual reduction of the input intensity, the transmitted intensity does not retrace the same path, resulting in a hysteresis loop. This hysteresis loop shows that the LPFG supports the occurrence of optical bistability.

AIP conference proceedings•Jan 1, 2020•0 citations
The exact solution of the nonlinear equations, describing phase conjugation (PC) was obtained. Theoretical dependence of the backward wave intensity on that of interacting waves with Gaussian time shape exhibits well-pronounced hysteresis, which causes the bistable operation when total pump intensity exeeds some critical value Icr. Several hysteresis loops are expected to appear with further increase of pumping.
We report our observations of optical bistabilities and hysteresis1 in photorefractive passive phase conjugate resonators with BaTiO3, caused by grating erasure effects between two resonators in three different configurations. Bistable oscillations have been observed between two semilinear oscillators, two ring resonators, and also between a ring and a semilinear resonator. In the experimental arrangement used for bistability studies, a single-mode argon ion laser beam (4880 Å) entered the crystal in a face appropriate for self-pumped phase conjugation. However, the orientation is kept in such a way that no self-pumped phase conjugation is observable if none of the resonators is in operation. In this geometry, bistability and hysteresis were observed in the signal intensity of one resonator as the reflectivity of the variable beam reflector in the second resonator was increased and then decreased in a cycle. Bistability was also seen in the signal intensity of a single resonator as a function of the reflectivity of the external mirror.
Analitical and numerical investigation of the wave-front conjugation in electrooptic crystals (LiNbO3, BaTiO3, SBN) show that noncavity optical bistability and hysteresis /1,2/ depends on the dominant mechanism of nonlinear responce (diffusion or drift) as on the orientation of the crystal C axis, and is strongly influensed by absorption or gain. Calculation show that critical effects may be observed for crystal length 0.1 cm (SBN, BaTiO3) and 1.5 cm (LiNbO3) for the optimal experimental geometry.
Optical bistability (ob) is investigated in CdS in a wide range of intensities. Under pulsed excitation (total pulse width 20 nsec) we find at 5K for ħωexc ≈ 2.550 eV on the flank of the AΓ5 exciton ob of the induced absorption type for incident intensities of Iexc ≈ 1kW/cm2. The nonlinearity is in this case a collision-broadening of the free exciton resonance [1]. The commutation times τ↓ and τ↑ are about 1 nsec and 5 nsec, respectively. For ħωexc ≈ 2.546 eV we observe absorptive ob due to the formation of an electron-hole plasma [2] for Iexc ≈ 1MW/cm2. Single shot experiments show τ↓ ≲ 500 psec being thus to our knowledge one of the shortest commutation times reported for single beam ob so far. The observed hysteresis loops are compared to model calculations with variable pulse lengths. The comparison indicates true ob in our experiments.
The nonlinear phenomena of optical bistablity is investigated analytically in chalcogenide glass long period fiber grating. Using the basic sets of nonlinear coupled mode equation the expression for the transmittivity of grating has been derived under nonlinear Kerr regime. To examine the bistable charateristics of the grating, the operating wavelength is considerd slightly above the resonance wavelength of 1550 nm i.e. for off resonance condition where detuning parameter δ≠0. It is observed that the intensity of the transmitted wave increases with increasing input intensity and reaches its maximum value at particular intensity. On gradual reduction of the input intensity, the transmitted intensity does not retrace the same path, resulting in a hysteresis loop. This hysteresis loop shows that the LPFG supports the occurrence of optical bistability.