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الرئيسية

ليزر الهيليوم_نيون

كما اسلفنا سابقا فان ليزر الهيليوم_نيون يعد مثالا لليزرات الغاز فهو يتكون من غازي الهيليوم والنيون بنسبة 1:10 .

مكونات ليزر الهيليوم_نيون :

1/ انبوبة من الزجاج بها غازي الهيليوم والنيون .

2/ مرآتان مستويتان احداهما عاكسة والاخرى شبه منفذة .

3/ مجال كهربائي او تردد عالي لإثارة ذرات الغاز .

طريقة عمل جهاز ليزر الهيليوم_نيون :

يقوم المجال الكهربائي أو فرق الجهد على اثارة ذرات الهيليوم من مستويات طاقة أدنى الى مستويات طاقة أعلى وعندما تصطدم ذرات الهيليوم المثارة مع ذرات النيون غير المثارة تحدث اثارة لذرات النيون وبذلك يتحقق وضع الإسكان المعكوس لذرات النيون حيث تتراكم في مستوى الطاقة الأعلى أو مستوى الطاقة شبه المستقر ، بعد ذلك تهبط ذرات النيون تلقائيا الى مستوى الطاقة الأدنى وتنتج فوتونات طاقتها تساوى الفرق بين طاقتي المستويين ، هذه الطاقة تقوم بحث مابقي من ذرات النيون في المستوى الأعلى لكي يحدث انبعاث مستحث .

تحدث انعكاسات متكررة للفوتونات التى تتحرك موازية لمحور الانبوبة على المرآتين فيحدث تضخم لهذا الإشعاع، عندما تصل شدة الاشعاع إلى حد معين يخرج جزء منه من خلال المرآة شبه المنفذة على شكل شعاع ليزر ويبقى باقي الإشعاع داخل الأنبوبة لتستمر عملية الانبعاث وانتاج الليزر ، أما ذرات النيون تعود لتثار بالتصادم مع ذرات الهيليوم التى بدورها تثار داخل الأنبوبة وهكذا دواليك .

3 تعليقات

Zainhome1993

عشاء البايتات
يوسف احمد

استمر
azaa press

تسلللم

إرسال تعليق (3)

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