Schematic of optical pumping
(Click figure to enlarge)
System configuration
(Click photo to enlarge)
Sweep and pumping signals
Sweep and resonant signals
Note: oscilloscope not included
Features
Open structure for hands-on learning
High accuracy for g-factor measurement
Robust system with high-quality components
Introduction
Optical pumping is an important experiment in modern physics. It reveals many important physics concepts such as atomic energy states and atomic transitions in atomic physics, optics, electromagnetism, and electronics. This technique has a wide range of applications in fundamental physics research, accurate measurement of magnetic field, as well as atomic frequency standards.
To promote hands-on learning, this apparatus is designed with an open structure. Discrete components such as Rubidium lamp, absorption cell, photodetector, and lenses can be easily installed and aligned on a metal rail. A light-proof cloth cover is provided to minimize the impact of ambient light on the system.
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Using this instrument, the following experiments can be conducted:
1. Observe optical pumping signal
2. Measure g-factor
3. Measure earth magnetic field (horizontal and vertical components)
Specifications
| Description | Specifications |
| Horizontal DC magnetic field | 0 ~ 0.2 mT, adjustable, stability < 5×10-3 |
| Horizontal modulation magnetic field | 0 ~ 0.15 mT (P-P), square wave 10 Hz, triangle wave 20 Hz |
| Vertical DC magnetic field | 0 ~ 0.07 mT, adjustable, stability < 5×10-3 |
| Photodetector | gain > 100 |
| Rubidium lamp | lifetime >10000 hours |
| High frequency oscillator | 55 MHz ~ 65 MHz |
| Temperature control | ~ 90 oC |
| Interference filter | central wavelength 795 ± 5 nm |
| Quarter wave plate | working wavelength 794.8 nm |
| Polarizer | working wavelength 794.8 nm |
| Rubidium absorption cell | diameter 52 mm, temperature control 55 oC |
Parts List
| Description | Qty |
| Main Unit | 1 |
| Power Supply | 1 |
| Auxiliary Source | 1 |
| Wires and Cables | 5 |
| Compass | 1 |
| Light Proof Cover | 1 |
| Wrench | 1 |
| Alignment Plate | 1 |
| Manual | 1 |
Schematic of optical pumping
(Click figure to enlarge)
System configuration
(Click photo to enlarge)
Sweep and pumping signals
Sweep and resonant signals
