- Small-Size, 40 mm x 80 mm x 120 mm
- USB Interface
- Power Supply from USB Port
- No External Controller, No External Power Supply
- Wavelengths from 375 nm to 785 nm
- Pulse Repetition Rate 20, 50 and 80 MHz
- Pulse Width Down to 40 ps
- Fast ON / OFF / Multiplexing Capability
- Trigger Input for Synchronisation to External Clock Sources
- Excellent Timing Stability
- Excellent Power Stability
- No Warm-Up Time
- Free-Beam or Single-Mode Fibre Output
- Free-Beam Power in Pulsed Mode up to 3 mW
- Internal Power Stabilisation Loop
- USB 3.0, USB 2.0 Compatible
- Compatible with all bh TCSPC Devices
Description
The BDU-SM series picosecond diode lasers are fully controlled and powered via a USB interface. Available wavelengths range from 375 nm to 785 nm. The lasers are available with circular free-beam output, and with single-mode fibre output.
As the BDS-SM lasers, also the BDU-SM lasers feature extraordinarily high timing stability and intensity stability. The optical pulse versus the electrical trigger output shifts by no more than 2 picoseconds over 10 minutes, even immediately after turn on. The power is stable within 1 %. No warm up-time is necessary for stable operation. Small size, absence of external components, and easy control of the laser parameters make the laser first choice for quick setup of experiments in a typical laboratory environment.
Specifications
|
|
BDU-SM |
|
Optical |
|
|
Repetition Rate, selected via USB |
20 MHz, 50 MHz, 80 MHz and CW Operation, Other on Request |
|
Wavelength / nm |
375, 405, 445, 473, 485, 515, 640, 685, 785, Other on Request |
|
Pulse Width (FWHM, at Medium Power, at Maximum Power) 2) |
30 - 90 ps, 60 - 300 ps |
|
Power Control Range (Power in Free Beam, 80 MHz) |
0 to 1 mW … 0 to 5 mW (Depending on Wavelength Version) |
|
Power Control Range (CW Mode, Power in Free Beam) |
0 to 10 mW, Limited by USB Power Supply |
|
Diameter of Laser Beam (Free Beam) |
0.8 mm |
|
Polarisation |
Vertical |
|
Coupling Efficiency into Single-Mode Fiber (typ.) |
40% to 60% |
|
SYNC / Trigger Output (Con 1) |
|
|
Connector |
SMA |
|
Pulse Amplitude |
-1.2 V (Peak) into 50 Ω |
|
Pulse Width |
1 ns |
|
Output Impedance |
50 Ω |
|
Jitter between Trigger and Optical Pulse |
< 5 ps |
|
Timing Stability, Trigger Out to Optical Pulse |
< 2 ps over 10 minutes |
|
Synchronisation Input (Con 2) |
|
|
Connector |
SMA |
|
Input Pulse Amplitude |
+3.3 V to +5 V into 50 Ω |
|
Duty Cycle |
10 to 30 %; DC Equivalent must be < 2.5 V |
|
Input Frequency Range |
10 to 80 MHz |
|
Switching Between External SYNC and Internal Oscillator |
Vav < 2.5 V: External. Vav > 2.5 V: Internal |
|
Laser ON / OFF Modulation Input (Con 3) |
|
|
Signal Levels |
TTL / CMOS |
|
Response Time of Optical Output to ON / OFF Signal |
< 4 µs for Power 10 to 100 % |
|
Standard Configuration, Active H, Normally ON |
TTL / CMOS H: Emission ON, pull-up resistor |
|
Special Configuration, Active H, Normally OFF |
TTL / CMOS H: Emission ON, pull-down resistor |
|
Special Configuration, Active L, Normally ON |
TTL / CMOS H: Emission ON, pull-down resistor |
|
Special configurations on demand |
|
|
Safety Interlock Function (Con 3) |
|
|
Laser Enabled |
Con 3 INTLCK connected to GND |
|
Laser Disabled |
Con 3 INTLCK open |
|
USB Interface |
|
|
Version |
USB 2.0 standard |
|
Connector |
USB C |
|
Power Supply |
|
|
Power Supply Voltage |
+5 V from USB port |
|
Power Supply Current |
200 mA to 800 mA |
|
Mechanical Data |
|
|
Dimensions, Icluding Heat Sink |
(40 x 80 x 120) mm |
|
Mounting Thread |
four M3 Holes |
|
Maximum Values |
|
|
Supply Voltage |
4.5 V to 5.5 V |
|
Voltage at 'Laser ON/OFF' Input |
-2 V to +7 V |
|
Ambient Temperature |
0 °C to +40 °C |