Applications of Nd YAG laser

Nd YAG laser has following applications or uses or advantages:

  • They produce continuous laser at room temperature
  • They can be used as portable systems since the rods are small.
  • they have surgical applications.
  • they are used material processing such as drilling, spot welding and marking.
  • They are used as pumping tunable visible light lasers.
  • They have applications in military such as including range finders and target designators.
  • Research applications such as Raman spectroscopy, remote sensing, mass spectrometry.

Reference: This article is referred from my authored book “optics and lasers” having ISBN 978-81-272-3833-9. In case of any doubt, post in the comment section.

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B.I.S. institute Moga

Name: B.I.S. institute is situated in the city Moga (Punjab) of India.

Affiliated with: Punjab Technical University (PTU), Kapurthala

Approved by: All India Council for Technical Education (AICTE), New Delhi.

Courses offered:


  • Computer Science Engineering
  • Information Technology
  • Electronics and Communication Engineering
  • Mechanical Engineering
  • Civil

Eligibility for Admission in B.Tech.

10+2 Non-Medical (PCM) passed.

Admission Procedure: –

Total seats are classified in 2 categories. Institute can fill 33% of the seats (Management Quota) directly provided the students possess requisite qualification. Balance (67%) seats are filled through counselling conducted by PTU on the basis of ranking in All India Engineering Entrance Exam (AIEEE).


Email :

Address : Moga-Amritsar Highway,
Gagra-142043 (Moga) Punjab
Dharamkot Road,
Kot-Ise-Khan-142043 (Moga) Punjab

Phone: 92572-95601

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Construction of helium neon laser

The helium-neon laser was the first gas laser to be operated successfully. It was fabricated by Ali Javan and his co-workers in Bell Telephone Laboratories in the USA in 1961.

Helium neon laser used a mixture of 10:1 for its active medium. It consists of a long and narrow discharge tube of diameter of about 1 cm and about 80 cm long. The mixture is at a pressure of about 1 mm of Hg, the partial pressure of helium gas being 5 to 10 times that of neon.

Active medium: The gas mixture of He and Ne forms the active medium. Ne act as active center.

Pumping Source: Electric discharge method is used for pumping and achieving population inversion.

Optical resonator system: A set of mirrors form the optical resonator system.

Reference: This article is referred from my authored book “optics and lasers” having ISBN 978-81-272-2948-2. Try to make the construction figure. In case of any doubt, post in comment section.

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