Becker & Hickl - Model BDU-SM Series - USB-Controlled Picosecond Diode Lasers
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.
- 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
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