BDS-SM Series

Small Size ps Diode Laser
  • Pulse Width Down to 30 ps
  • Repetition Rate 20 MHz /50 MHz / 80 MHz / CW (Switchable)
  • External Trigger via Synchronisation Input
  • Free Beam or Single-Mode Fiber Output
  • Optical Power Up to 50 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-SM

Optical

Wavelength / nm

375, 405, 445, 473, 485, 515, 640, 685, 785, 1024, Other on Request

Repetition Rate

20, 50, 80 MHz and CW Operation, Other on Request

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

30 - 90 ps, 60 - 300 ps

Power Control Range (Power in Free Beam)

0 to 1 mW … 0 to 5 mW (Depends on Wavelength Version)

Power Control Range (CW Mode, Power in Free Beam)

0 to 20 mW … 0 to 50 mW (Depends on Wavelength Version)

Diameter of Laser Beam (Free Beam)

0.8 mm (Circular) or 1 x 3 mm (Elliptical, Depends on Version)

Polarisation

Horizontal

Coupling Efficiency into Single-Mode Fiber (typ.)

Up to 60 % (Circular Version)

Trigger Output

Pulse Amplitude

-1.2 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 Input Connector

Control Inputs

Frequency (20, 50, 80 MHz) and CW Operation

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 1)

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 2)

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

(1) Depends on case temperature due to laser diode cooling. Cooling current changes with case temperature.
(2) 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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