Quality evaluation of quasi-phase-matched devices by far-field diffraction pattern analysis

Phase reversal quasi-phase matching devices are fairly capable of yielding a dual peak second harmonic spectral response. However, it does suffer from uneven intensity and overlapping of the peaks. In this paper, we analyze the effect of the errors to which these devices are prone. Such unavoidable errors are bound to happen during the poling process even under controlled conditions. The second harmonic spectral response is analyzed by introducing two sorts of possible errors in an ideal phase reversal quasi-phase matching device. Initially, the aperiodic domain is kept fixed at the center of the device and its width is altered to determine the intensity variation of the peaks. When the width of the aperiodic domain is not equal to twice the periodic domain width, an unequal peak response is observed. Secondly, the aperiodic domain width is kept constant while the aperiodic domain is moved along the length of the device to determine the interference between the peaks. If the aperiodic domain is not positioned exactly at the center, a disturbance of the peaks’ intensities is noticed.

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A systematic approach for designing quasi-periodic optical superlattices using the Hadamard matrix

Meenakshisundaram

Pandiyan

Kashyap

2013

J. Opt.

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We propose a novel and systematic approach for constructing quasi-phase-matched grating structures using the Hadamard matrix. Using this new approach, we have exploited the efficacy of the Hadamard matrix in quasi-phase matching technology, by comparing the second-harmonic spectral response with the corresponding power spectra of the Hadamard matrix. We have successfully identified various existing quasi-periodic optical superlattices from different columns of the Hadamard matrix. On employing our framework, we further indicate a systematic method for constructing various new quasi-periodic optical superlattices.

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Quality evaluation of quasi-phase-matched devices by far-field diffraction pattern analysis

Cited by 7 publications

References 7 publications

Design and development of low-cost room temperature electric field poling system for the fabrication of quasi-phase matching devices

Design and development of low-cost room temperature electric field poling system for the fabrication of quasi-phase matching devices

Analysis of a phase reversal quasi-phase matching device for the dual peak second harmonic response

A systematic approach for designing quasi-periodic optical superlattices using the Hadamard matrix

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