Setup for P-I curve measurement
Setup for beam divergence measurement
Setup for polarization measurement
Setup for spectral characterization
Note: computer not included
Features
Observe spectral curve of semiconductor laser with CCD array spectrometer
Understand optical characteristics of semiconductor laser
Measure basic parameters of semiconductor laser such as divergence angle and degree of polarization
Complete system
Introduction
LEOI-58 is designed to measure the output power of a semiconductor laser as well as the driving voltage and current of the laser, so that students can understand the working characteristics of a semiconductor laser under CW output mode. A CCD array spectrometer (optical multi-channel analyzer) is used to monitor the fluorescence spectrum of the semiconductor laser when the laser injection current is lower than the threshold current, and the subsequent spectral variation of the laser under laser oscillation condition when the injection current is greater than the threshold current.
Using this system, the following measurements can be conducted with semiconductor lasers:
1. Output power characterization of semiconductor laser
2. Divergent angle measurement of semiconductor laser
3. Degree of polarization measurement of semiconductor laser
4. Spectral characterization of semiconductor laser
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.
Specifications
| Item | Specifications |
Semiconductor Laser | Output Power< 5 mW |
| Center Wavelength: 650 nm | |
Semiconductor Laser Driver | 0 ~ 40 mA (continuously adjustable) |
CCD Array Spectrometer | Wavelength Range: 300 ~ 900 nm |
| Grating: 600 L/mm | |
| Focal Length: 302.5 mm | |
| Rotary Polarizer Holder | Minimum Scale: 1° |
Rotary Stage | 0 ~ 360°, Minimum Scale: 1° |
| Multi-Function Optical Elevating Table | Elevating Range>40 mm |
Optical Power Meter | 2 µW ~ 200 mW, 6 scales |
Part List
| Description | Qty |
| CCD Array Spectrometer (LEOI-100) | 1 |
| 650-nm Semiconductor Laser (LLL-1) | 2 |
| Semiconductor Laser Driver | 1 |
| Focusing Lens with Holder | 1 each |
| Four-Axis Adjustable Holder (SZ-24) | 1 |
| Two-Axis Adjustable Holder (SZ-06) | 1 |
| Multi-Function Optical Elevating Platform | 1 |
| Optical Goniometer (SZ-47) | 1 |
| Rotary Polarizer Holder (SZ-51) | 1 |
| Polarizer | 1 |
| Attenuator | 1 |
| White Screen (SZ-13) | 1 |
| Optical Power Meter with Detector Head | 1 set |
| Software CD (Windows 7, 32/64-Bit PCs) | 1 |
Setup for P-I curve measurement
Setup for beam divergence measurement
Setup for polarization measurement
Setup for spectral characterization
