What is the advantage of a He Ne laser over a ruby laser?

What are the disadvantages of ruby laser?

Drawbacks of ruby laser

  • As the terminus of laser action is the ground state, it is difficult to maintain the population inversion. …
  • The ruby laser requires high power pumping source.
  • The laser output is not continuous but occurs in the form of pulses of microsecond duration.

What are the merits and demerits of He and Ne laser?

HeNe Lasers: Pros and Cons

  • High coherence length. This is very typical to most gas lasers. …
  • Stable central wavelength. The typical emission wavelength of HeNe lasers is about 632.816 nm in air. …
  • High spectral purity. …
  • Good beam quality and alignment. …
  • Low-cost. …
  • Short life-time. …
  • Long warm-up time. …
  • Low output power.

What is the objective of He-Ne laser experiment?

Experiment objectives: assemble and align a 3-mW HeNe laser from readily available optical components, record photographically the transverse mode structure of the laser output beam, and determine the linear polarization of the light produced by the HeNe laser.

What are the advantages of diode laser over conventional lasers?

The advantage of Laser diodes are given below:

It gives high power output as compared to other lasers. Laser diode is smaller in size as compared to other types of laser. It is easily manufactured in arrays. It is the cheaper device to produce laser output.

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Why flash lamp is used in ruby laser?

Active medium or active center: Chromium ions act as active centers in ruby crystal. So it is the chromium ions that produce the laser. Pumping source: A helical flash lamp filled with xenon is used as a pumping source. … Thus, optical pumping is used to achieve population inversion in ruby laser.