fa بررسی اثر چیدمان چند عبوری بر تخلیه پرتو دمش در تولید هماهنگ دوم تخصصی Special پژوهشي Research <p><font size="2"><b><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">این</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">مقاله</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">به</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بررسی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تأثیر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">چیدمان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">چند</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">عبوری</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">شرایط</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">جورشدگی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">فازی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تخلیه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">پرتو</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دمش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">یک</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">برپایی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تولید</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">هماهنگ</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دوم</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">پرداخته</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ایم</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>. </i></font></font><font size="2"><b><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بررسی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">این</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">چیدمان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دریافتیم</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">که</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">با</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">افزایش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">غیر</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">مستقیم</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">طول</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">برهم</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">کنش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">از</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">طریق</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بازتاب</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">های</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">متوالی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">پرتو</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">لیزر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دمش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">هماهنگ</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دومش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">میان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دو</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">آینه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">غیرموازی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تعبیه</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">شده</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">طرفین</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بلورغیر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">خطی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>KTP</i></font></font><font size="2"><b><span lang="fa-IR">،</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بازده</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تبدیل</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">را</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">افزایش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">می</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">دهد</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>. </i></font></font><font size="2"><b><span lang="fa-IR">چیدمان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">چند</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">عبوری</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">را</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">برای</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تولید</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">هماهنگ</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دوم</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">لیزر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">پالسی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>Nd:YAG </i></font></font><font size="2"><b><span lang="fa-IR">با</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">استفاده</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">از</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بلور</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دو</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">محوری</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>KTP </i></font></font><font size="2"><b><span lang="fa-IR">شبیه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">سازی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">کرده</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">با</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">تغییر</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">زاویه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">میان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">آینه</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">محور</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">بلور</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">توان</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">خروجی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">هماهنگ</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دوم</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">را</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">محاسبه</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">کرده</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ایم</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>. </i></font></font><font size="2"><b><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">نهایت</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">محدوده</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">مجاز</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">چرخش</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">آینه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ها</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">را</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">در</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">دو</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">جهت</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">زاویه</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">قطبی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">سمتی</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">به</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">دست</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">آورده،</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">و</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">نمودار</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">های</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">مورد</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">نیاز</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">را</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">از</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">نتایج</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">استخراج</span><font face="Times New Roman, serif"><span lang="fa-IR"> </span></font><span lang="fa-IR">کرده</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>&shy;</i></font></font><font size="2"><b><span lang="fa-IR">ایم</span></b></font><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;"><i>.</i></font></font></p> <p><font face="Liberation Serif, serif"><font size="2" style="font-size: 9pt;">This work is represented to investigate a multi-pass scheme and its effect on both the phase matching condition and the pump beam depletion in a second-harmonic generation scheme. It is found that this arrangement is capable of enhancing the conversion efficiency through indirect increasing of effective interaction length which was reached by using consecutive reflections of the fundamental beam and its second-harmonic wave between two antiparallel mirrors embedded along both sides of the KTP nonlinear crystal. Such multi-pass scheme is simulated for the second-harmonic radiation of a pulsed Nd:YAG laser using a biaxial KTP crystal. By changing the angle between the mirror and the crystal axial, the output power of the second harmonic light is correspondingly computed. Finally, the range of polar and azimuthal angles for mirror rotation is simulated and the required graphs have been carried out from the results.</font></font></p> بازده­ی تبدیل, تخلیه­ی پرتو دمش, تولید هماهنگ دوم, جورشدگی فاز, چیدمان چند عبوری. conversion efficiency, pump depletion, second-harmonic generation, multi-pass scheme. 17 20 http://opsi.ir/browse.php?a_code=A-10-1-1382&slc_lang=fa&sid=1 maryam kheyri مریم خیری mkheiri90@gmai.com 10031947532846005650 10031947532846005650 Yes دانشگاه اصفهان saeed Ghavami Sabouri سعید قوامی صبوری s.ghavami@gmail.com 10031947532846005651 10031947532846005651 No دانشگاه اصفهان Alireza Khorsani علیرضا خورسندی a.khorsandi@sci.ui.ac.ir 10031947532846005652 10031947532846005652 No دانشگاه اصفهان