BDS-MM Series

Small Size ps Diode Laser
  • Pulse Width Down to 65 ps
  • Repetition Rate 20 MHz and 50 MHz
  • External Trigger via Synchronisation Input
  • Free Beam or Multi-Mode Fiber Output
  • Optical Power Up to 60 mW
  • Fast ON / OFF / Multiplexing Capability
  • All Electronics Integrated
  • No External Driver Unit
  • Simple +12 V Supply
  • 40 x 40 x 120 mm3 or 40 x 70 x 120 mm3

 

BDS-MM

Optical

Wavelength / nm

405, 450, 525, 640, 685, 785, 915, Others on Request

Repetition Rate, Switchable by TTL Signal

20 MHz and 50 MHz, Other Combinations on Request

Pulse Width (FWHM, at Medium Power, at Maximum Power)

65 - 120 ps, 120 - 300 ps

Max. Optical Power

10 mW to 60 mW at 50 MHz (Depends on Wavelength Version)

Coupling Efficiency into Fibers (Multi-Mode, typ.)

100 µm: 60 %, 200 µm: 80 %, 500 µm: 90 %

Warm-up Time for Power and Pulse Shape Stabilisation after Power On

1 min1)

Trigger Output

Pulse Amplitude

-1 V (Peak) into 50 Ω

Pulse Width

1 ns

Output Impedance

50 Ω

Connector

SMA

Jitter between Trigger and Optical Pulse

< 10 ps

Synchronisation Input

Input Amplitude

+3.3 V to +5 V into 50 Ω

Duty Cycle

10 to 30 %; DC Equivalent must be < 2.5 V

Input Frequency

20 to 60 MHz

Switching from Internal Clock to Sync Input

Automatic, by Average Voltage at Trigger Connector

Control Inputs

Frequency (20, 50 MHz)

TTL / CMOS high

Laser ON / OFF

TTL / CMOS low

Response of Optical Output to ON/OFF Signal

< 4 µs for Power 10 to 100 %

External Power Control

Analog Input, 0 to +10 V

Response Time of Optical Output to Power Control

< 4 µs for Power 10 to 100 %

Power Supply

Power Supply Voltage

+9 V to +15 V

Power Supply Current at 12 V

200 mA to 500 mA 2)

Mechanical Data

Dimensions (OEM)

40 mm x 40 mm x 120 mm

Dimensions (w/ Cooling)

40 mm x 70 mm x 120 mm

Mounting Thread

four M3 Holes

Heat Sink Requirements

< 2 °C / W 3)

Maximum Values

Power Supply Voltage

0 V to +15 V

Voltage at 'Laser ON/OFF' and 'Frequency' Inputs

-2 V to +7 V

Voltage at 'Laser Power' Input

-12 V to +12 V

Ambient Temperature

15 °C to +35 °C 3)

(1) Operation below 15 °C ambient temperature may result in extended warm-up time.
(2) Depends on case temperature due to laser diode cooling. Cooling current changes with case temperature.
(3) OEM version without active cooling must be mounted on heat sink. Case temperature must remain below 40 °C.

The bh TCSPC Handbook
7th edition, corrected and updated September 2017

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