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Product details
-Instrument Introduction
By adjusting the helium neon laser, changing the cavity length of the resonant cavity, and observing the changes in beam parameters, students can cultivate their hands-on experimental skills. Using a confocal spherical scanning interferometer to allow students to observe the spectral distribution of transverse and longitudinal modes more intuitively.
-Product Features
Can conduct experiments:
1. Learn the installation and tuning of helium neon lasers, and understand the principles and structures of gas lasers. Learn about the collimation, tuning, and oscillation of helium neon lasers, as well as the generation of lasers.
2. Measure the laser spot distribution and calculate the divergence angle.
3. By changing the cavity length and output mirror, observe and measure the relationship between cavity type and laser power, transverse mode, longitudinal mode, and verify the theory of resonant cavity.
4. Observe the spectral distribution of longitudinal and transverse modes using a confocal spherical scanning interferometer, and measure the fine constants of the scanning interferometer.
-Basic configuration and parameters
number |
name |
parameter |
1 |
Optical experiment guide rail |
long1m, with ruler; Swallowtail design, made of aluminum alloy material |
2 |
laser device |
External cavity laser, with or without such a special window, center wavelength632.8nmPower ≥1.5mW; Output mirrorThere are two types of curvature radii, R=1m and R=∞, with a reflectivity greater than 99.8%. |
3 |
Collimated laser |
The wavelength is 650nm, the power stability is better than 1%, the power is greater than 4mw, and it contains a protection module |
4 |
sawtooth generator+Confocal spherical scanning interferometer |
Sine wave modulation amplitude:0~250VContinuously adjustable, frequency20~50Hz; Fine constants>100Free spectral range:4GHz |
5 |
Optical power indicator |
Display 3 and a half digits. Range: including 200uW, 2mW, 20mW, 200mW, adjustable gears, with a minimum resolution of 0.1uW. The calibration wavelength is 632.8nm; |
6 |
Adjust the frame |
Including four-dimensional adjustment frame, two-dimensional adjustment frame, gain crystal three-dimensional adjustment frame |
7 |
other |
Adjustable slit, small hole screen, oscilloscope, etc. |
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