Michelson Lab.pdf

Part (D) Measuring the wavelength and spectra of an unknown laser usingFourier Transform SpectroscopyProcedure:Follow the Procedure of Part (B).Do the following:1. Remove the vacuum chamber and ensure that the system is fully aligned as inPart (A) with the photodetector in place.2. Replace the HeNe Laser with the unknown laser, and ensure that you haveinterference fringes.3. Use the “Motor” tab of main.vi to take a large data set (move more than 5mm)while moving the motor at a relatively slow speed. Save the data.WARNING: operating the motor at too high a speed greatly distorts the FourierTransform Waveform. Can you explain why this is so?4. Open the data set using ReadData.vi. Insert the calibration factor that wascalculated in Part (A).5. Perform the Fourier Transform Analysis and comment on the wavelength ofoperation of the laser.6. Does the laser operate at a single wavelength?7. Provide printouts of the screen capture of your analysis (Press Alt-PrntScrn tocapture the screen) to support your analysis.8. If the unknown laser has more than one peak, (i.e. not single mode) complete(9) and (10) below...9. What is the wavelength separation between adjacent peaks?10. What is the frequency separation between adjacent peaks?4 of 13