IOM 2020, Експеримент — Задача 2
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
In the figure draw the direction of projection of the optical axis of the crystal onto the horizontal plane. Draw this line through the center of the circle of the protractor. Write down the angles that this line crosses on the protractor scale.
Отговори
- 41 and 221 (±2 degrees)
Решение
Answer 2
Blue lines - find the center of the circle.
We build the optical axis (its projection onto the plane of the drawing) along the ends of the arrows of the object (or along any identical parts in the images).
Transfer the projection of the axis so that it passes through the center of the circle (green thick line.)
Angles: 41 and 221
±2 degrees. The main thing is that the sum is 180 deg (179-181)
Experimental data for second harmonic generation.
| KDP 0.5 cm | KDP 2.0 cm | KDP 4.0 cm | |||
|---|---|---|---|---|---|
| First harmonic Power, Watts | Second harmonic Power, Watts | First harmonic Power, Watts | Second harmonic Power, Watts | First harmonic Power, Watts | Second harmonic Power, Watts |
| 11040 | 0.801 | 6662 | 3.725 | 3413 | 1.902 |
| 20850 | 2.517 | 20170 | 35.31 | 5990 | 5.867 |
| 40230 | 10.111 | 36980 | 126.1 | 12580 | 26.88 |
| 74900 | 32.14 | 64740 | 390.2 | 22940 | 84.08 |
| 93200 | 54.09 | 82900 | 569 | 37210 | 240.2 |
| 126800 | 97.89 | 108400 | 1050 | 54780 | 565.9 |
| 147200 | 131.1 | 127400 | 1387 | 81350 | 1157 |
| 165100 | 169.7 | 151200 | 1977 | 97730 | 1574 |
| 171700 | 184.2 | 167400 | 2388 | 116300 | 2319 |
| 177500 | 2697 | 138000 | 3224 | ||
| 153000 | 4127 | ||||
| 155400 | 4331 |
Experimental data for third harmonic generation.
| First harmonic Power, Watts | Third harmonic Power, Watts | Second harmonic Power, Watts | Third harmonic Power, Watts |
|---|---|---|---|
| 7768 | 0.4 | 147 | 9.01 |
| 12950 | 1.5 | 432.8 | 30.13 |
| 26010 | 9.2 | 667.8 | 51.41 |
| 40890 | 30.77 | 1384 | 123.9 |
| 58310 | 70.1 | 2182 | 217.3 |
| 76790 | 110.9 | 3000 | 318.9 |
| 98830 | 210 | 4546 | 557 |
| 117900 | 265.5 | 4913 | 577.8 |
| 137000 | 412.9 | 5550 | 678.3 |
| 154600 | 502.8 | ||
| 162900 | 685.1 | ||
| 166200 | 676.7 |
Оригинал в Архива: exp.pdf