وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.

مجرة
هارفارد بزنس ريفيو
إم آي تي تكنولوجي
العلوم للعموم
نفسيتي
ستانفورد للابتكار الاجتماعي
اشترك الآن
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التكنولوجيا

عملية تضخيم الضوء بالانبعاث المستحث للإشعاع |  Laser: light amplification by stimulated emission of radiation “Lasing”

22 أبريل 2020


تحدث عملية الليزر عندما تُستحث الإلكترونات داخل مادة ما بطاقة خارجية؛ فتنتقل بعض هذه الإلكترونات إلى مستويات طاقة أعلى غير مستقرة، لذلك بعد فترة قصيرة من الزمن تسقط هذه الإلكترونات عائدة إلى مستوياتها الأولى، وتُطلق الطاقة التي امتصتها في بداية انتقالها، وبعض هذه الطاقة يكون في صورة شعاع الليزر، وتُسمَّى هذه العملية بالإشعاع المستحث. ويتميز شعاع الليزر بكونه شعاعاً حاداً ذا تردد مُحدَّد، وهذا على عكس الضوء العادي الذي يحمل عدة ترددات. تتوفر ترددات شعاع الليزر في نطاق الضوء المرئي، والأشعة تحت الحمراء، والأشعة فوق البنفسجية.


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