آذر 10, 1399

تاریخچه لیزر

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تاریخچه لیزر

پیشنهاد استفاده از گسیل القایی از یک سامانه با جمعیت وارون برای تقویت امواج میکروویو به‌طور مستقل را وبر، جوردون، زیگر، باسو، تانز و پروخورو دادند. نخستین استفاده عملی از چنین تقویت کننده‌هایی توسط گروه جوردون، زیگر و تاونز در دانشگاه کالیفرنیا انجام شد. این گروه نام میزر را که سرواژهٔ عبارت «Microwave Amplification by Stimulated Emission of Radiation» است، برای آن برگزیدند.

مبانی نظری لیزر را آلبرت انیشتین در ۱۹۱۶ (میلادی) طی مقاله‌ای مطرح کرد ولی سال‌های نسبتاً زیادی طول کشید تا صنعت و فناوری امکان ساخت نخستین لیزر را فراهم کند. چارلز تاونز در سال ۱۹۵۳ میزر (تقویت‌کننده موج میکروویو) را اختراع کرد و خواست آزمایش‌های خود را حول جایگزینی نور مرئی به جای فروسرخ ادامه دهد و هم‌زمان این امر میان آزمایشگاه‌های گوناگون در سراسر جهان به عنوان رقابتی جدی در نظر گرفته شد. نخستین لیزر با استفاده از گذار میکروویو در مولکول‌های آمونیاک ساخته تلتبتب در سال ۱۹۵۸ نخستین بار پیشنهاد فعالیت لیزر در فرکانس‌های نوری در مقاله‌ای توسط اسکاولو و تاونز داده شد. عبارت لیزر در همان زمان در مقاله‌ای از «گوردون هولد»، دانشجوی دکترای دانشگاه کلمبیا، پیشنهاد شد و تئودور میمن (Theodore H. Maiman) لیزر پالسی یاقوت را در ۱۹۶۰ ساخت. نخستین لیزر گازی را نیز علی جوان فیزیکدان ایرانی در سال ۱۹۶۱ با استفاده از هلیوم و نئون ساخت. در سال ۱۹۶۲ نیز پیشنهاد لیزرهای نیمه‌هادی مطرح گردید. نور لیزر را تکفام پرتو نیز می‌نامند.

از سال ۱۹۶۶ لیزر نیم‌ رسانا در مخابرات نوری در ژاپن و آمریکا مورد توجه قرار گرفت و نسبت به امکان مد گردانی مستقیم آن تا فرکانس‌های بسیار زیاد شناخت حاصل شده‌است.

علی جوان زادهٔ ۵ دی ۱۳۰۵، تهراندرگذشته ۲۲ شهریور ۱۳۹۵ فیزیک‌دان و مخترع ایرانی که اولین لیزر گازی هلیوم_ نئون دنیا ساختهٔ وی می‌باشد. او استاد بازنشسته دانشکده فیزیک دانشگاه ام آی تی و ساکن ایالات متحده آمریکا بود.

علی جوان در دسامبر ۱۹۶۰ نخستین لیزر گازی دنیا را اختراع کرد که ترکیبی از دو گاز هلیوم و نئون بوده و به همین خاطر با نام لیزر هلیوم-نئون نامیده می‌شود این لیزر از نوع لیزرهای بی خطر به حساب می‌آیدY رنگ آن سرخ است و در آزمایشگاه‌های دانشگاه‌ها برای بررسی پدیده‌هایی مانند تداخل امواج و آزمایش دو شکاف یانگ کاربرد دارد.

جایزه ها

مدال بنیاد «فه‌نی و جان هرتز»
مدال فردریک ایوز
جایزه جهانی علمی آلبرت انیشتین

مدال استوارت بالنتاین انجمن فرانکلین

انتخاب بعنوان دوازدهمین نابغه زنده دنیا توسط نشریه دیلی تلگراف

خواندن 233403 دفعه آخرین ویرایش در دوشنبه, 10 آذر 1399 11:30
محتوای بیشتر در این بخش: « لیزر چیست ؟ کاربرد های لیزر »

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