Laser Installation for the Measurement of the Acoustic Fields Parameters on the Surface of Acoustic Wave Guides

Abstract

Abstract. For the first time the possibility of the development and fabrication of the design nondetuned functional optical scheme of the laser heterodyne installation intended for the investigation of the amplitude and phase fields of surface acoustic waves (SAW). The design is characterized not by separate optical elements but the presence of the two units -probe unit and photo-sensor with minimal number of optical elements. This enabled to reduce errors during amplitude and phase measurements, because the installation setup provides high sensitivity to the small amplitude of SAW and good reproducibility of the results. The optical scheme of the device is presented operation principle is described as well as the results of some investigations. Àíîòàö³ÿ. Âïåðøå ïîêàçàíà ìîaeëèâ³ñòü ðîçðîáêè òà ñòâîðåííÿ ñò³éêî¿ â³äíîñíî 䳿 äå-ñòàá³ë³çóþ÷èõ ôàêòîð³â ôóíêö³îíàëüíî¿ îïòè÷íî¿ ñõåìè ëàçåðíî¿ ãåòåðîäèííî¿ óñòàíîâêè, ïðèçíà÷åíî¿ äëÿ äîñë³äaeåííÿ àìïë³òóäíèõ ³ ôàçîâèõ ïîë³â ïîâåðõíåâèõ àêóñòè÷íèõ õâèëü (ÏÀÕ). Âîíà âèêîíàíà íå îêðåìèìè îïòè÷íèìè åëåìåíòàìè, à ç³áðàíà ç äâîõ óçë³â -âó-çîë çîíäà ³ âóçîë ôîòîïðèéìà÷à ç ì³í³ìàëüíèì ÷èñëîì îïòè÷íèõ åëåìåíò³â. Öå äàëî çìîãó çìåíøèòè ïîõèáêó ïðè ïðîâåäåíí³ àìïë³òóäíèõ òà ôàçîâèõ âèì³ð³â, îñê³ëüêè óñòàíîâêà çà-áåçïå÷óº âèñîêó ÷óòëèâ³ñòü äî ìàëèõ àìë³òóä ÏÀÕ ³ õîðîøó â³äòâîðþâàíí³ñòü ðåçóëüòàò³â. Íàâîäèòüñÿ îïòè÷íà ñõåìà, âèêëàäåíî ïðèíöèï 䳿 óñòàíîâêè, íàäàþòüñÿ ðåçóëüòàòè äåÿêèõ äîñë³äaeåíü.Êëþ÷îâ³ ñëîâà: ïîâåðõíåâ³ àêóñòè÷í³ õâèë³, ãåòåðîäèííèé ìåòîä, àìïë³òóäà, ôàçà