Fabry Perot resonator - Fabry Perot mode analyzer

VP5.8.5.4
Fabry Perot resonator - Fabry Perot mode analyzer
Fabry Perot resonator - Fabry Perot mode analyzer

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Description

A Fabry Perot resonator is formed by two mirrors aligned parallel to each other. The resulting cavity changes transparency when the distance of the mirrors is changed by a multiple of half the wavelength. Scanning the length of the cavity creates a high resolution spectrometer.
Experiment P5.8.5.4 shows an open frame scanning Fabry Perot. As scanner a Piezo element and as probe a two mode Helium Neon laser is used. The mode spectrum of the Helium Neon laser is displayed on an oscilloscope and the characteristic parameter like finesse, free spectral range, resolution and contrast are measured and discussed. Additional components for beam expansion are used to investigate the effect of technical Finesse. Additional mirrors are used to show the difference of a plane and confocal Fabry Perot arrangement.

Components of equipment sets

1 474104  8  Focussing Optics, f = 60 mm LD
1 4741404 Lens f = 150 mm, C25 Mount and Plate LD
1 474140 Beam expander lens, adjustment holder LD
1 4745213 Achromat f = 20 mm, C25 mount LD
1 4745234 Laser Mirror, flat, M16 mount LD
1 4745235 Laser Mirror, R = 75 mm, M16 Mount LD
1 4745236 Laser Mirror, R = 100 mm, M16 Mount LD
1 4745237 Laser Mirror, flat, M12 Mount LD
1 4745238 Laser Mirror, R = 75 mm, M12 Mount LD
1 4745239 Laser Mirror, R = 100 mm, M12 Mount LD
1 474113  8  Laser Mirror Adjustment Holder, left LD
1 474317 Piezo Actuator Controller LD
1 474139 Piezo Element with Adjustment Holder LD
1 522561  4  Function generator P LD
2 50102  8  BNC cable, 1 m LD
1 501091  8  BNC T adapter LD
1 57524  4  Screened cable, BNC/4 mm Plug LD
1 474306 Photodetector signal conditioning box LD
1 474108 SiPIN photodetector LD
1 4745464  8  Oscilloscope, Dual Channel, Digital LD
1 474303  8  HeNe Laser High Voltage supply, adjustable LD
1 4745421 HeNe Pilot Laser Ø 30 mm LD
1 4745445 Profile Rail 1000 mm LD
2 474210 Mounting plate Ø 30 mm, carrier 20 mm LD
1 474122 Optics cleaning set LD
1 6719700  4  Ethanol, absolute, 250 ml LD
GHS02GHS07 H225 H319
2 474251  8  Transport and Storage Box #01 LD
1 4747103  4  LIT: Fabry Perot Resonator LD
2 471828  4  * Adjustment goggles for He-Ne-laser LD

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P5.8.5.4 Fabry Perot resonator
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