Fabry Perot Interferometer CCD Based OE-7028

Description

Fabry Perot Interferometer CCD Based OE-7028
A Fabry Perot Interferometer is an optical interferometer in which a beam of light undergoes multiple reflections between two reflecting surfaces and its resulting optical transmission (or reflection) is periodic in wavelength. The Fabry – Perot design contains plane surfaces that are partially reflecting so that multiple rays of light are responsible for the creation of the observed interference patterns. For high resolution spectroscopy, where a resolution in the range of MHz to GHz is required, a Fabry – Perot interferometer (FP) is used.

In Fabry – Perot interferometer, the distance between the partially reflecting mirrors are varied by using coarse and finely adjustable translation stage driven by micro-meters. One mirror is fixed and the other is mounted on the translation stage through a kinematic mount. This two axis kinematic mount is used to correct the parallelism between beam splitter.

This system is similar to Fabry Perot Interferometer apart from the fact that in this case, the interference pattern is captured by a CCD sensor and displayed on a computer monitor. The advantage of computer interface is that the fringes can be saved for future analysis.

Experiment Performed
  • To find wavelength of Light source
  • To find the Spacing between two mirrors by using fringes
  • To find the Finesse and Free Spectral Range of the etalon from fringes
Feature
  • Precision design of optical components
  • Well polished Mirrors
  • Easy to operate
  • Extended durability
  • High resolution camera
  • Mercury lamp used

Experimental set up Contain Quantity
Optical rail with stands Length 1000mm

Fabry Perot Interferometer (Spacing of plates 4+/- 1 mm)

Convex lens with mount (f =100mm)

Diode laser < 5mW (650nm or 532nm)

Diode laser power supply

White screen (Acrylic)

Kinematic laser mount

Mercury Vapor lamp

Mercury Vapor lamp power supply

Mercury Vapor lamp mount

Color filter mount

Color filter (green and blue)

CCD/CMOS Camera with mount

Camera lens assembly

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