IOM 2020, Експеримент — Задача 10

Answer Sheet

Внимание: Бележка към темата

The source is the experimental-round answer sheet with the official answers overlaid in red; the task description with the experiment setup (videos) is not in the archive, and the answer-sheet pictures are available only with the answers drawn on them.

Условие

Q.10 a) What is the second harmonic wavelength if the first harmonic wavelength is 1064 nm?

Q.10 b) In what plane does the optical axis of the crystal lie?

Photograph of the setup in the dark: a white screen on the left with a bright green spot, and a nonlinear crystal in a holder on the right glowing green.
Schematic: a beam ω enters a rectangular nonlinear crystal from the right; the 2ω beam leaves towards a screen with a green spot on the left; coordinate axes from the corner O of the crystal: q along the beam towards the screen, p horizontal across the beam, r vertical; labels Screen, Nonlinear crystal, 2ω, ω, q, p, r, O.

Q.10 c) In what plane does the first harmonic polarization lie? In the figure, indicate the direction.

Q.10 d) In what plane does the second harmonic polarization lie? In the figure, indicate the direction.

Отговори

Решение

Experimental data for second harmonic generation.
KDP 0.5 cmKDP 2.0 cmKDP 4.0 cm
First harmonic Power, WattsSecond harmonic Power, WattsFirst harmonic Power, WattsSecond harmonic Power, WattsFirst harmonic Power, WattsSecond harmonic Power, Watts
110400.80166623.72534131.902
208502.5172017035.3159905.867
4023010.11136980126.11258026.88
7490032.1464740390.22294084.08
9320054.098290056937210240.2
12680097.89108400105054780565.9
147200131.11274001387813501157
165100169.71512001977977301574
171700184.216740023881163002319
17750026971380003224
1530004127
1554004331
Experimental data for third harmonic generation.
First harmonic Power, WattsThird harmonic Power, WattsSecond harmonic Power, WattsThird harmonic Power, Watts
77680.41479.01
129501.5432.830.13
260109.2667.851.41
4089030.771384123.9
5831070.12182217.3
76790110.93000318.9
988302104546557
117900265.54913577.8
137000412.95550678.3
154600502.8
162900685.1
166200676.7

Оригинал в Архива: exp.pdf