Suppression of dynamic instability and comparison of the response time in mutually pumped phase conjugators

The origin and the suppression of dynamic instability have been experimentally studied in mutually pumped phase conjugators when the two input beams are coherent. Experimental results show that the dynamic instability of the phase conjugation outputs arises from the competition among backscattering gratings, reflection gratings, and shared transmission gratings. The effect of the competition on the coupling channel is also presented. A simple method, the slight vibration of the experimental table is proposed. It can eliminate the dynamic instability. The response time is measured and fit for several kinds of discovered mutually pumped phase conjugators. We find that the bird-wing and sickle mutually pumped phase conjugators, which have one internal reflection, have a shorter response time. A possible explanation is suggested.

[1]  J P Huignard,et al.  Noise suppression in photorefractive image amplifiers. , 1989, Optics letters.

[2]  M. Segev,et al.  Coupling of diode laser arrays with photorefractive passive phase conjugate mirrors , 1987 .

[3]  Baruch Fischer,et al.  Nonlinear multi two-wave mixing, the fanning process and its bleaching in photorefractive media , 1990 .

[4]  Ratnakar R. Neurgaonkar,et al.  Mutually pumped phase conjugation in photorefractive strontium barium niobate: theory and experiment , 1990 .

[5]  R R Neurgaonkar,et al.  Mutually pumped phase conjugator as a moving-object correlator. , 1993, Optics letters.

[6]  B. Fischer,et al.  Spatial light modulation and filtering effects in photorefractive wave mixing , 1987 .

[7]  Jack Feinberg,et al.  Photorefractive effects and light‐induced charge migration in barium titanate , 1980 .

[8]  D R Selviah,et al.  Mutually pumped phase-conjugate mirror: fish-head configuration. , 1995, Optics letters.

[9]  M D Ewbank,et al.  Mechanism for photorefractive phase conjugation using incoherent beams. , 1988, Optics letters.

[10]  M. Segev,et al.  Double phase conjugation , 1994 .

[11]  Malcolm W. Wright,et al.  INJECTION LOCKING SEMICONDUCTOR LASERS WITH PHASE CONJUGATE FEEDBACK , 1994 .

[12]  P. Xie,et al.  THEORETICAL AND EXPERIMENTAL STUDIES OF FANNING EFFECTS IN PHOTOREFRACTIVE CRYSTALS , 1993 .

[13]  G J Dunning,et al.  Control of self-pumped phase-conjugate reflectivity using incoherent erasure. , 1990, Optics letters.

[14]  T. Shimura,et al.  Injection locking and mode switching of a diode laser with a double phase-conjugate mirror. , 1993, Optics letters.

[15]  Z. Shao,et al.  Double phase conjugation in copper-doped potassium sodium strontium barium niobate crystals. , 1997, Applied optics.

[16]  R R Neurgaonkar,et al.  Double phase conjugation in tungsten bronze crystals. , 1990, Applied optics.

[17]  David M. Pepper,et al.  Phase conjugation by stimulated photorefractive scattering using a retroreflected seeding beam , 1992 .

[18]  N Yoshikawa,et al.  Mutually pumped phase conjugator with a rainbow configuration in BaTiO(3):Ce crystal using nanosecond pulses. , 1996, Optics letters.

[19]  Pochi Yeh,et al.  Effect of beam coherence on mutually pumped phase conjugators , 1995 .

[20]  R W Eason,et al.  Analysis of mutually incoherent beam coupling in BaTiO(3). , 1987, Optics letters.

[21]  B H Soffer,et al.  Hybrid optoelectronic neural networks using a mutually pumped phase-conjugate mirror. , 1991, Optics letters.

[22]  Xiaodong Mu,et al.  Sickle Mutually Pumped Phase-Conjugate Mirror: Theoretic and Experimental Demonstration , 1997 .