Quantum Instruments Cascade Laser Starter Kit manual Specifications, Utilisation

Starter Kit Instruction Manual Appendix 56

10.1.3Specifications

Bias frequency . . . . . . . . . . . . . . . . Up to 100 Hz

Achievable shift . . . . . . . . . . . . . . . . . . . . . . . . 0.1%

Input voltage Uin . . . . . . . . . . . . . . . . . . . 0 to 3 V

Input voltage threshold . . . . . . . . . . . . . . . . 0.6 V

Input frequency Fin . . . . . . . . . . . . . . 0 to 1 kHz

Input impedance Zin . . . . . . . . . . . . . . . . . . 100Ω

Output Umon max . . . . . . . . . . . . . . . . . . . . . 2.5 V

Output impedance Zmon . . . . . . . . . . . . . . . 10 Ω

Ratio Umon/Ib . . . . . . . . . . . . . . . . . . . 10mV/mA

10.1.4Utilisation

The current into the sink must not exceed too much a value given by the laser specifications as follows:

•The largest allowed peak current of the laser from the LI-curves, multiplied by the respec- tive duty cycle gives the upper limit of the mean laser current.

Imax = Ipmax∗d

•The sum of the Bias current (Ib ) and the actu- ally applied mean laser current (Ip∗d ) should be limited by the upper limit of the mean laser current.

Ib + Ip∗d ≤ Ipmax∗d

•The Bias-T itself has a limit at:

Umon = 2.5V or

Uin = 3V

Note: If higher voltages are applied, excessive heating of the Bias-T may occur and destroy the laser.