Laser diodes array power supply unit
PSL-120.1
 

Application

Power supply unit is used for laser diodes array (LDA) pumping current forming, which work in quasi-continuous mode.

Features

Special tools used for leading and trailing edges forming ensure optimum LDA operating mode. These conditions essentially enlarge LDA durability. Special circuit solutions effectively safes LDA from primary source damages. Main power supply merits are small size, low heat generation, high efficiency.

Output current and voltage pulses of PSL-120.1 unit oscillograms

Output current pulse	Output voltage pulse
Output current pulse leading and trailing edges

 

Characteristics of PSL-120.1

Output current pulses operating amplitude range, A	20 ... 120
Output current amplitude setup error, A	± 1
Output current amplitude long-term stability in case of maximum ambient temperature changes, not more than, %	± 3
Output current amplitude long-term stability in case of ±20C ambient temperature changes, not more than, %	± 1,5
Minimum pulses off-duty factor in case of maximum output current	70
Output current pulses duration operation range, us	60 ... 200
Output current pulse edge duration while using interface cable with rejected capacity, not more than, us	30
Output current pulse edge delay relatively input pulse edge, measured at 0.1 from maximum value, us	10
Maximum output voltage at maximum output amplitude, V	3,5
Admissible ambient temperature without forced air cooling,°С	-25 ... +40
Admissible ambient temperature with air cooling at V=0.1…0.2m/s,°С	-25 ... +55

Primary power source’s requirements

• Power supply at +58V: voltage deviation – not more than +5%, used pulsed current – not more than 10A, average used current – 130mA. It is recommended to use C-L-C ore active filter in this supply. In this case it is possible to decry supply voltage till +55V.
• Power supply at +12V: voltage deviation – not more than +10%, used pulsed current – not more than 0.1A, average used current – 60mA.
• Power supply at -12V: voltage deviation – not more than +10%, used current – not more than 15mA.
   

Extended functional ability

Combined action of PSL-120.1 and thermoelectric cooler (TEC) control unit PSC-120.2 is foreseen. This TEC control unit ensures:

• LDA temperature maintenance;
• Pumping current pulses time parameters setup;
• Pumping current pulses amplitude and LDA temperature control;
• Pumping current pulses amplitude parameters setup and monitoring via PC;
• Work synchronizing of some pairs of PSL-120.1 and PSC-120.1 in case of multi-channel pumping system of laser active element.