Schematic of apparatus
(Click figure to enlarge)
1. Laser diode
2. Nd:YVO4 crystal
3. KTP crystal
4. Output mirror
5. Detector head
6. He-Ne laser
7. Laser power meter
8. Laser diode driver
Schematic of diode laser pumping
(Click figure to enlarge)
Frequency doubled 532 nm laser
(Click photo to enlarge)
Features
Laser diode output up to 500 mW at 808 nm
Variable pumping current
Frequency doubling via crystal
Including He-Ne alignment laser and optical power meter
Laser safety googles for OD4+ protection against 532/808/1064 nm laser radiation
Introduction
The LEOI-50 Diode-Pumped Solid-State (DPSS) Laser Demonstrator is a specialized teaching apparatus designed to facilitate the understanding of nonlinear optics in educational settings such as universities and colleges. This system provides a hands-on approach to studying the operation and principles behind diode-pumped solid-state lasers (DPSS) and their use in frequency doubling techniques.
The system features a solid-state laser that uses Nd:YVO4 (Neodymium-doped Yttrium Orthovanadate) as the gain material, pumped by a semiconductor laser emitting light at 808 nm. The laser emits infrared light at 1.064 μm. The integration of a KTP (Potassium Titanyl Phosphate) crystal within the laser cavity facilitates the process of frequency doubling, where the laser light is converted into green light (at approximately 532 nm). This phenomenon of frequency doubling serves as a practical demonstration of nonlinear optics.
Using this system, students will gain a deeper understanding of key concepts in nonlinear optics, including:
1. Frequency Doubling Phenomenon:
Students will observe the process of frequency doubling through the KTP crystal and measure its efficiency and related parameters.
2. Frequency Doubling Efficiency:
Students will be able to measure and analyze the efficiency of the frequency doubling process, understanding how much of the laser's infrared light is successfully converted to green light.
3. Phase Matching Angle:
The system allows students to measure and understand the phase matching angle, which is crucial for optimizing the frequency doubling process.
4. Basic Parameters of DPSS Lasers:
The system provides insights into the fundamental parameters involved in the operation of a diode-pumped solid-state laser, including the gain medium, pump source, and the frequency doubling process.
The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Theory and Contents to find more information about this apparatus.
Specifications
| Semiconductor Laser | |
| CW Output Power | ≤ 500 mW |
| Polarization | TE |
| Center Wavelength | 808 ± 10 nm |
| Operation Temperature Range | 10 ~ 40 °C |
| Driving Current | 0 ~ 500 mA |
| Nd: YVO4 Crystal | |
| Nd Doping Concentration | 0.1 ~ 3 atm% |
| Dimension | 3×3×1 mm |
| Flatness | < λ/10 @632.8 nm |
Coating | AR@1064 nm, R<0.1%; t="">90%@808 nm |
| KTP Crystal | |
| Transmissive Wavelength Range | 0.35 ~ 4.5 µm |
| Electro-Optic Coefficient | r33=36 pm/V |
| Dimension | 2×2×5 mm |
| Output Mirror | |
| Diameter | Φ 6 mm |
| Radius of Curvature | 50 mm |
| He-Ne Alignment Laser | ≤ 1 mW @632.8 nm |
| IR Viewing Card | Spectral response range: 0.7 ~ 1.6 µm |
| Laser Safety Goggles | OD= 4+ for 532 nm, 808 nm, and 1064 nm |
| Optical Power Meter | 2 μW ~ 200 mW, 6 scales |
Part List
| Description | Qty |
| Optical Rail (LEPO-54) | 1 |
| Two Axis Adjustment Holder (SZ-21) | 2 |
| Four Axis Adjustment Holder (SZ-24) | 2 |
| He-Ne Laser Holder (SZ-42) | 1 |
| 808 nm Semiconductor Laser | 1 |
632.8 nm He-Ne Alignment Laser (LLL-2A) | 1 |
| KTP Crystal | 1 |
| Nd: YVO4 Crystal | 1 |
| Output Mirror | 1 |
| Optical Filter | 1 |
| Alignment Aperture | 1 |
| Optical Power Meter | 1 |
| Power Cord | 2 |
| IR Viewing Card | 1 |
| Laser Safety Goggles | 1 |
| User's Manual | 1 |
Schematic of apparatus
(Click figure to enlarge)
1. Laser diode
2. Nd:YVO4 crystal
3. KTP crystal
4. Output mirror
5. Detector head
6. He-Ne laser
7. Laser power meter
8. Laser diode driver
Schematic of diode laser pumping
(Click figure to enlarge)
Frequency doubled 532 nm laser
(Click photo to enlarge)
