Optical phase conjugation in a lithium formate crystal

Avizonis, Petras V.; Hopf, F. A.; Bomberger, W. D.; Jacobs, S. F.; Tomita, Akira; Womack, K. H.

doi:10.1063/1.89723

Cited by 73 publications

(10 citation statements)

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“…Phase conjugation using a three-wave mixing interaction in a nonlinear crystal has been reported by Avizonis et al 159 Heer and G r i f f e n 1 42 have generated a forward conjugate wave in thin nonlinear optical media using the D F W M geometry shown in Fig. Numerous authors have reported phase conjugation using various forms of stimulated scattering, including stimulated B r i l l o u i n , 1 4 9 -1 5 5 R a m a n , 1 5 6 , 1 5 7 and R a y l e i g h 1 58 scattering.…”

Section: O S C I L L a T O R O U T P U T F I L M P L A N E -mentioning

confidence: 80%

Self-Action Effects and Degenerate Four-Wave Mixing

Reintjes

1984

Nonlinear Optical Parametric Processes in Liquids and Gases

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Section: O S C I L L a T O R O U T P U T F I L M P L A N E -mentioning

confidence: 80%

Self-Action Effects and Degenerate Four-Wave Mixing

Reintjes

1984

Nonlinear Optical Parametric Processes in Liquids and Gases

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“…4-7, with transversal dimensions that almost perfectly match those of the real objects down to 40 m. As a final remark, we note that the results for case (b) are better in quality than those for case (a), because the holographic image is real and hence there is no need for any optical element to image it. Scheme (b) is thus more suitable for applications, among which we mention optical phase conjugation, 10,19,24,25 that can be used for recovering wave fronts from aberrations. 20,26,27 Fig .…”

Section: Discussionmentioning

confidence: 99%

“…3) x F /z F Ӎ sin ␤ 1 and y F /z F Ӎ sin 1 . By introducing, in expressions (19), the phasematching conditions that apply to the present case ( 3 ϭ 0), i.e., k 1 sin 1 ϭ Ϫk 2 sin 2 and (20) where we have defined…”

Section: Application Of Theorymentioning

confidence: 99%

“…It was some years ago that his holographic approach was rediscovered and used to interpret the outputs of three-wave mixing interactions in second-order nonlinear crystals. [4][5][6][7][8][9][10][11] In fact, even though since the beginning of their history second-order nonlinear optical processes have been used to implement image processing in several experimental configurations, [1][2][3][12][13][14][15][16][17][18][19][20] the holographic properties of these processes were mentioned only in relation to optical phase conjugation at degeneracy. Moreover, most experiments were both performed and modeled in simplified conditions, that is, at frequency degeneracy and for collinearly propagating fields.…”

Section: Introductionmentioning

confidence: 99%

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Difference-frequency-generated holograms of two-dimensional objects

et al. 2004

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We demonstrate both analytically and experimentally that second-order nonlinear interaction in a uniaxial crystal produces a holographic replica of one of the incident fields. In particular, we consider differencefrequency generation and directly calculate the field transformation that is produced by the nonlinear interaction for some simple but nontrivial two-dimensional objects, such as a long wire, a circular hole, and a regular net. Finally we show experimental results for such objects that validate the theoretical calculations.

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“…Another potentially useful property is that, when wavelength-converting, the idler beam image is the phase conjugate of the input beam, and, with OPA, the phase conjugation occurs in the forward direction. As a result, OPA imaging can be performed without the use of imaging lenses [10][11][12][13] ; if the same wavelength is used for the signal and the idler (that is, operating at degeneracy), an exact replica of the spatial distribution of the input signal, but with gain, appears the same distance after the nonlinear medium as the object before it. A typical OPA imaging apparatus.…”

Section: Optical-parametric-amplification Imagingmentioning

confidence: 99%

Optical-parametric-amplification imaging of complex objects

Vaughan

Trebino

2011

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X

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We used ultrafast Fourier-plane optical-parametric-amplification (OPA) imaging to simultaneously image, wavelength-shift, and amplify complex two-dimensional objects with spatial features from 1.1 to 11.3 line-pairs/millimeter, corresponding to a two-dimensional space-bandwidth product (SBP) of 13,790. This represents an increase in image complexity over previous analogous OPA imaging systems by almost three orders of magnitude. In wavelength-shifting the image from 930nm to an idler wavelength of 700nm, we observed image amplification by up to two orders of magnitude. OPTICAL-PARAMETRIC-AMPLIFICATION IMAGINGThe ultrahigh intensities available from ultrafast-laser technology allow access to a wide range of high-intensity phenomena and techniques. Whereas earlier laser systems required tightly focused beam spots in order to achieve sufficient intensities, recent advances in Ti:Sapphire regenerative amplifiers ("regens") allow high-intensity interactions of unfocused beams with relatively large diameters. Vastly improved stability in such systems also makes practical previously impractical highly nonlinear processes.Optical parametric amplification (OPA) 1 , in particular, which experiences gain that is an exponential of the pump-beam amplitude, benefits greatly from these technological advances. OPA has long been used to nonlinear-optically amplify weak input signals 2 , as well as to wavelength-convert them, usually from the infrared into the visible 3 . Unfortunately, due to its highly nonlinear nature, OPA is very sensitive to and severely limited by shot-to-shot jitter of the laser. Pulses that are too weak can yield no signal, and pulses that are too intense can yield undesirable background in the form of optical-parametric generation (OPG) or, worse, can damage the crystal. Such issues significantly complicate applications of OPA, and, as a result, OPA, perhaps more than any other optical process, benefits from the high intensity and, especially, the vastly improved shot-to-shot jitter of these laser systems.Indeed, the use of OPA for imaging applications (see Fig. 1) should benefit greatly. OPA imaging involves imaging an object (or target) with amplification and perhaps also simultaneous wavelength conversion, spatial-frequency filtering, time-gating and phase conjugation. An imaging system images or focuses the target onto a nonlinear medium, where an OPA pump beam amplifies (and potentially wavelength shifts and time-gates) it, and an additional imaging or focusing system transfers the image from the OPA medium to a camera (or free space propagation onto the camera results in phase-conjugation).The first demonstration of OPA imaging occurred in 1968, when Midwinter amplified and frequency-shifted an IR image to the visible 4, 5 . Since then, both monochromatic 6 and polychromatic 7 images have been amplified. When OPA is performed to amplify or frequency-shift an image, the interaction takes place between the signal and pump beams in the nonlinear medium, but different interaction planes can be used, dep...

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Optical phase conjugation in a lithium formate crystal

Abstract: Optical phase reversal has been demonstrated using type-II phase matching in lithium formate operated as a degenerate optical parametric amplifier with pump peak powers as low as 103 W. The amplifier was driven in a collimated geometry.

Cited by 73 publications

References 4 publications

Self-Action Effects and Degenerate Four-Wave Mixing

Self-Action Effects and Degenerate Four-Wave Mixing

Difference-frequency-generated holograms of two-dimensional objects

Optical-parametric-amplification imaging of complex objects

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