Construction and Working of He-Ne laser

This video explains Construction and Working of He-Ne laser. After explanation of construction, role of Helium in He-Ne laser is discussed. Answer to the question why the proportion of He:Ne is 10:1 is also discussed. Working is discussed on the basis of energy level diagram and at the end, merits and demerits are discussed in brief.
Sound credit : Chaitanya

[@your_only_kouhai]

I passed my semester exams because i watched your videos

[@sujalkumarsangem9619]

Thank you sir, u gave a very comfortable class sir . I think all the people who see this will understand very quickly including me....

[@EngineeringPhysicsbySanjiv]

Most welcome.. and best luck..👍

[@zk-fc4so]

best video for understanding He Ne laser action.. Thank you

[@EngineeringPhysicsbySanjiv]

Thanks🙏

[@Tarunkumar-ff8sb]

Hi sir your videos are really helpful to me in my preparation
Thank you sir

[@EngineeringPhysicsbySanjiv]

Thanks

[@ramakrishnasrram6712]

Simple and perfect explanation sir 👌
Thank you so much!

[@EngineeringPhysicsbySanjiv]

Most welcome.. Glad it helped you 🙂

[@jackhammer9489]

For any reason the sound is not clear of your videos. Sometimes it gets difficult to understand what you are saying. Except that I found your class is really helpful.

[@jayavishwanathraut3115]

Sir you explain in such manner that all concept are easily cleared

[@EngineeringPhysicsbySanjiv]

Thank you for the complement..

[@Muskanperveen07]

Thank you sir ❤ I am really looking for such type of explanation thanks again😁

[@user-fz6er8mh3c]

thanks sir🥰🥰 It's so helpfull in exam time😍🥰😇😇🤗🤗

[@thorer6778]

Very well explained
Greetings from germany

[@EngineeringPhysicsbySanjiv]

Thanks a lot.. keep watching..

[@shounaksarkar1480]

I like your lucid way of explanation.

[@EngineeringPhysicsbySanjiv]

Thanks.. please share with ur friends also

[@lavanyam270]

Well explained all the topics👏. Thank you sir.

[@mayankagrawal6109]

Very well explained thank you very much sir for this video 😀

[@EngineeringPhysicsbySanjiv]

Thank you

[@deepakrajpoot2536]

Great explanation ...thank u very much sir..

[@EngineeringPhysicsbySanjiv]

Most welcome and best luck 👍

[@Manishamanu06]

Well explained sir👏👏

[@ezkodes]

Explanation 🔥🔥

[@EngineeringPhysicsbySanjiv]

Thank you..

[@user-fz6er8mh3c]

thanks sir It's so hepfull in exam time🥰🥰😍😍🤗🤗😇😇😇😇😇🙂🙂😊😊😊

[@learner0010]

Excellent explanation sir!🙂

[@EngineeringPhysicsbySanjiv]

Keep watching

[@Health_asset]

OP explaination sir, many many thanks sir 👌👌

[@EngineeringPhysicsbySanjiv]

Most welcome..

[@jacobvandijk6525]

I always think that lasers are useful (too) because of the energy they create. But how much is the net gain?

[@EngineeringPhysicsbySanjiv]

Energy is not created. It is converted from one form to other. The efficiency of laser is very low..

[@jacobvandijk6525]

@@EngineeringPhysicsbySanjiv I wasn't aware of that. Thank you for your reply.
This link confirms what you say: www.rp-photonics.com/wall_plug_efficiency.html

[@shashankravibhagwat1]

Amazing sir!

[@EngineeringPhysicsbySanjiv]

Thanks a lot!

[@srikanthchebrolu1091]

Well demonstrated 😊

[@EngineeringPhysicsbySanjiv]

Thank you

[@blazeindian667]

Very well explained sir

[@EngineeringPhysicsbySanjiv]

Thank you..

[@Tooba-1218]

Great video. I have one question though, how come heavy Ne atoms gets excited by light He atom ? And eventhough the energy levels are at same level, does not it means Ne atoms will also require same amount of energy to gets excited because obv He atoms will only dissipate energy equivalent to what they have absorbed as a result of exvitation.

[@goldenera2210]

Best explanation 😊

[@EngineeringPhysicsbySanjiv]

Thanks a lot 😊

[@sujathak8101]

Excellent explanation sir

[@drsumankhanal]

Great video. I am curious what would happen if partially reflecting mirror is replaced by a plane glass?

[@EngineeringPhysicsbySanjiv]

Then photons wont be reflected back, all photons will be transmitted and amplification will stop. So laser beam will not be intense..

[@yash-xx2pu]

thank you so much sir !!

[@EngineeringPhysicsbySanjiv]

Most welcome.. share with friends also..

[@adityapulipati1221]

Not admitted in somaiya college but getting benefit wow thats amazing

[@jabbariqra6097]

Why metastable state has more life time than other excited state?

[@EngineeringPhysicsbySanjiv]

It is just the lack of efficient processes for depopulating a certain level. For example, spontaneous emission may be prohibited by selection rules, i.e., by certain symmetries of wavefunctions.

[@jabbariqra6097]

@@EngineeringPhysicsbySanjiv thanks sir ,God bless you

[@Minisha.k]

Thanks a lot

[@EngineeringPhysicsbySanjiv]

Welcome

[@abhionyoutube792]

Thank you sir, also make a video on Nicole prism sir

[@EngineeringPhysicsbySanjiv]

Noted.. will try..

[@abhionyoutube792]

@@EngineeringPhysicsbySanjiv thank you sir

[@abhionyoutube792]

Sir make a video on Ruby laser if possible...

[@EngineeringPhysicsbySanjiv]

will try to upload

[@user-bi7hl4lm4h]

🤩🤩🤩

[@CodewizardSumit]

🔥🔥

[@rohanchoudhary2115]

sir ruby laser per video bna dijie

[@EngineeringPhysicsbySanjiv]

ruclips.net/video/-ZKhxUHPS7E/видео.html

[@ajmal770]

Sir pls do raman spectroscopy classes

[@EngineeringPhysicsbySanjiv]

will definitely try..

[@ajmal770]

Ok sir

[@hp10p35]

Notes please pdf

[@EngineeringPhysicsbySanjiv]

Engineering Physics Notes links
drive.google.com/file/d/1Ikw8Z0T6GRiRNnNOcjAK5Awprm0m9pXt/view?usp=drivesdk
drive.google.com/file/d/1DK4jO1E-8qEojxkqHrDOwsefhAQ9iqkv/view?usp=drivesdk

[@EngineeringPhysicsbySanjiv]

Engineering Physics Notes links
drive.google.com/file/d/1Ikw8Z0T6GRiRNnNOcjAK5Awprm0m9pXt/view?usp=drivesdk
drive.google.com/file/d/1DK4jO1E-8qEojxkqHrDOwsefhAQ9iqkv/view?usp=drivesdk

[@dr.mrs.archanasrivastava4062]

when spontaneous emission takes place between E3 to E2 in Ne atom, then what is the role of emitted photon.

[@EngineeringPhysicsbySanjiv]

spontaneous emission results into releasing the energy in the form of a photon, which is emitted in a random direction and does not contribute in light amplification.

[@dr.mrs.archanasrivastava4062]

@@EngineeringPhysicsbySanjiv Thank you Sir. That means photons emitted due to transition between E3 to E2 are incoherent.

[@satyajeetpatil6899]

[@saheligarai4063]

Sir please upload this notes...

[@EngineeringPhysicsbySanjiv]

Notes links
drive.google.com/file/d/1Ikw8Z0T6GRiRNnNOcjAK5Awprm0m9pXt/view?usp=drivesdk
drive.google.com/file/d/1DK4jO1E-8qEojxkqHrDOwsefhAQ9iqkv/view?usp=drivesdk

[@mdraheemahmed2380]

Its 5 level laser system, not 4 level

[@Luffy_2804]

Hamre University ke teacher apke notes chura ke 🗿🗿📉 khud ka watermark laga re h 😹👐

[@EngineeringPhysicsbySanjiv]

Which university? Can you share me the notes shared by your teacher on [e-mail]