Question

7. A mode-locked Ti:Al203 laser with a cavity length of 1.5m and center wavelength of 790nm is used for optical frequency metrology. If the pulse duration is 20fs, and the laser has a hyperbolic secant square pulse profile a) Estimate the frequency bandwidth of the laser output.HINT: AtAf0.315 b) Estimate the number of modes in the laser output. c) If the pulse to pulse carrier envelope phase changes by 0.1rad, calculate the carrier offset frequency shift HINT: ΔωςΕ-ter d) What is the frequency spacing between modes?

Answer 1

Given hat laser wiik a Cavt length L-15 m 4 To esirmale andidk the laser u Frequenty Banduidt CAR) ap:0-35 -15 13 To estimate the nurnber op modes in tte hserouht No. oP mdes n laser atoat m m- 2L 2X15 o sp the pe to pase Camer enselope phase changes a Se Carier envelope eni s

CG ter RT CE is ðepealilion Where RT 3x 10 Pr 8 CE 2x1.S ain