| Vertical-cavity surface-emitting lasers (VCSELs) have distinct advantages over conventional edge emitting lasers, such as small divergence angle, single longitudinal mode operation and very low threshold current. They are especially suitable for making two-dimensional (2D) arrays as well as VCSELs based integrated devices. VCSELs are attractive light source for various applications including optical message processing, optical interconnection and optical calculation.VCSELs basic theory and the device characteristic are briefly introduced in this thesis. On the basis of the characteristic of VCSEL, kinds of drivers for VCSELs in different situations are designed. Our device is a direct current device, therefore, for the better care for the device, we used pulse current source driver, whose pulse width, frequency and maximum current are adjustable.For test VCSEL device temperature character, we designed an auto-testing apparatus for temperature characteristics of semiconductor lasers. Utilize one time automatic temperature changeable testing instead of multi times constant temperature testing, which take advantages for testing device temperature characteristics. Through simple analysis of the test data, come through the theory of the device's temperature characteristics. |
PDF Full Text Request