Poling Quality Evaluation of Periodically Poled Lithium Niobate Using Diffraction Method

Pandiyan, Krishnamoorthy; Kang, Yeon-Suk; Lim, Hwan Hong; Kim, Byeong‐Joo; Prakash, Om; Cha, Myoungsik

doi:10.3807/josk.2008.12.3.205

Cited by 15 publications

(7 citation statements)

References 13 publications

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“…We have fabricated a 15-mm-long CPS-AC-PPLN based on electric field poling at room temperature, a common technique used for the fabrication of QPM devices, especially for LN [24,25]. The + z faces of undoped, 0.5-mm-thick, z-cut, optical grade lithium niobate crystals were used.…”

Section: Fabrication and Characterizationmentioning

confidence: 99%

Design, fabrication and characterization of a specially apodized chirped grating for reciprocal second harmonic generation

Bostani¹,

Ahlawat²,

Tehranchi³

et al. 2015

Opt. Express

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A specially-designed apodized chirped PPLN based on particular positioning of poled regions within the periods has been realized theoretically and experimentally to demonstrate the reciprocal response in the SHG spectra over a 30-nm bandwidth, for up-chirp and down-chirp directions. The simulation results are compared with another apodized chirped PPLN for which the placement of poled regions is deviated from optimum positions. The average power difference is less than 0.75 dB and the standard deviations of extrema on second harmonic power responses are 1.34 dB and 1.64 dB for two up-chirp and down-chirp directions respectively.

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Section: Fabrication and Characterizationmentioning

confidence: 99%

Design, fabrication and characterization of a specially apodized chirped grating for reciprocal second harmonic generation

Bostani¹,

Ahlawat²,

Tehranchi³

et al. 2015

Opt. Express

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“…SHG spectrum presents overall nonlinear performance of QPM device, but it is mathematically equivalent to the far-field diffraction pattern and experimentally proved by Refs. [18][19]. As shown in Fig.…”

Section: Experiments and Discussionmentioning

confidence: 75%

“…5 (b). It was known that the intensity ratio between the first and second diffraction orders presented as [18][19] where I 1 and I 2 are the intensity of first and second diffraction order, respectively, and R is the duty ratio. The diffraction intensities about three samples were measured as shown in Fig.…”

Section: Experiments and Discussionmentioning

confidence: 99%

Poling Quality Enhancement of PPLN Devices Using Negative Multiple Pulse Poling Method

Choi¹,

Ro²,

Ko³

et al. 2011

Journal of the Optical Society of Korea

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A poling method using multiple negative voltage was introduced to fabricate periodically poled lithium niobate (PPLN) devices with quasi-phase matching (QPM) period of 12.9 µm by utilizing an real-time visualization system. We also performed variation of the electric field during the poling. Two different conventionally used poling method, negative and positive single pulses, were used and the poling quality compared through microscopic images and far-field diffraction pattern analysis. Etched images on the +z and -z surfaces of PPLN showed that negative multiple pulse poling presented the highest periodicity in domain structures among the three methods. Duty ratio and its standard deviation were measured by analyzing far-field diffraction patterns. The newly introduced method of negative multiple pulse poling had duty ratio of 0.42 which was close to the ideal value of 0.50 and standard deviation of 0.020 that was about 3 times smaller than that of the other conventional methods.

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“…Furthermore, the width of poled regions may increase in the poling process. This broadening is considered in two cases of linear and random 12% broadening of the poled region that can occur in the poling process [26]. For a 12% mark space broadening in each cell (Error B) and randomly varying between zero and 12% of the mark space ratio in poled regions (Error C), the ripples increase (0.35% of the average of minimum and maximum ripples) and the intensity shrinks, while the shape of the output still follows the response of the ideal Structure II.…”

Section: Effect Of Domain Error In the Proposed Apodized Chirped Strumentioning

confidence: 99%

Engineering of effective second-order nonlinearity in uniform and chirped gratings

2012

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The dependence of second harmonic generation conversion efficiency resulting from the position of poled regions of the second-order nonlinearity in uniform and chirped gratings in ferroelectric materials has been studied analytically and numerically. The displacement of the poled region's position from a specific location in second-order nonlinear materials can introduce a wavelength shift in a uniform grating's second harmonic intensity peak and strongly influences the bandwidth and ripple in the harmonic conversion response of chirped gratings. We propose that the poled regions should be located at specific positions within the single period to minimize the ripples and achieve a desired nonlinearity function, and also to significantly improve tolerance to fabrication errors.

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Poling Quality Evaluation of Periodically Poled Lithium Niobate Using Diffraction Method

Cited by 15 publications

References 13 publications

Design, fabrication and characterization of a specially apodized chirped grating for reciprocal second harmonic generation

Design, fabrication and characterization of a specially apodized chirped grating for reciprocal second harmonic generation

Poling Quality Enhancement of PPLN Devices Using Negative Multiple Pulse Poling Method

Engineering of effective second-order nonlinearity in uniform and chirped gratings

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