Is there any book explaining differences between gas lasers and semiconductor lasers?

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Vikash Pandey

There is a book,

Principles of Lasers by Orazio Svelto

which explains the difference in principle and construction of different types of lasers. In the book, a chapter each is devoted to the two types of lasers!

For spectroscopic applications see Demtroder and Hollas.

A S Rao

fallowing books can be useful for you

1. Laser electronics by Verdeyen

2. Integrated optics: theory and technology by Hunsperger

Krishna Kumar Soni

Laser Physics by Milloni