F-GX1000 Characteristic of fibe optics and        semiconductor laser

1 Understanding the electro-optical characteristics of semiconductor laser

2 Measuring the threshold current of semiconductor laser

3 Understanding the structure and classification of optical fiber and the basic transmission law of light in fiber

4 Understanding the concept, the physical meaning and measurement methods of numerical aperture of fiber

5 Studing optical properties of the fiber

Instrument Parameters

1 Semiconductor Laser:

type: GaN; working current :0-70mA; laser power :0-10mW; output wavelength: 650nm;

2 The total output voltage : 3.5-4V. Considering the protection circuit partial pressure, the voltage of diode core reduced to 2.2V.

3 Fiber loss rate: 70% per km, experiments used in fiber length: 200m, calculation of loss was 93.1%, such as laser output power is 10mW, the laser output after the removal of loss of the total power: 9.31mW, (used when calculating  

the coupling efficiency) .

4 Adjustable range of the signal source frequency: 10KHz-300kHz.