Picosecond UV Light Source
Picosecond Ultraviolet Light Source
Picosecond Pulsed LED
Small Size OEM Module, 40 mm x 40 mm x 120 mm
Pulse Width 500 ps to 800 ps
Pulse Repetition Rate 20 MHz, 50 MHz, 80 MHz
Wavelengths: 270 nm and 310 nm
Free Beam Output
Power Approx. 50 µW at 50 MHz
Fast ON / OFF / Multiplexing Capability
All Electronics Integrated
Simple +12 V Power Supply
Compatible with all bh TCSPC devices
The UVL series light sources are based on ultraviolet LEDs which are driven by high-speed picosecond pulse electronics. The devices provide pulsed light in a spectral range where diode lasers are not available. Pulse repetition rate is 20, 50, and 80 MHz, pulse width is in the range form 500 ps to 800 ps. Compared with lasers, the optical power is relatively modest. Another difference to lasers is that the emission does not come from a single spot but from a relatively large area. It therefore cannot be focused into a diffraction-limited spot or injected into optical fibres. Nevertheless, in combination with the high sensitivity of TCSPC the UVL-FB can be used for a wide range of fluorescence decay experiments in the ultraviolet spectral range. The figure below shows a fluorescence decay curve of Tryptophane, excited by a UVL-FB-270nm light source. The detector was a HPM-100-06 hybrid detector, the TCSPC module an SPC-150 NX.
When the UVL-FB is integrated in complex fluorescence measurement systems it can be used as it is. All that is needed is a +12V power supply and a voltage divider to set the power-control input voltage.
For laboratory application it is recommended that the UVL-FB is used with a LSB-C control box, which has controls for the repetition rate and output power.
UVL-FB
Optical
Wavelength / nm
270, 310
Repetition Rate / MHz
20, 50, 80
Pulse Width (FWHM, at Medium Power, at Maximum Power) 2)
typ. 580 ps, typ. 700 ps
Optical Power
Approximately 50 µW
Power Control Range
10 % to 100 %
Optical Beam Dimensions
see Figure in Datasheet
Trigger Output, to TCSPC Modules
Pulse Amplitude
-1.5 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 80 MHz
Switch between Internal Clock and Sync Input
Automatic, by Average Voltage at Trigger Connector
Control Inputs
Emission ON / OFF
TTL / CMOS, low means OFF, Internal Pull-Up
Response of Optical Output to Emission ON / OFF Signal
< 1 µs
External Power Control
Analog Input, 0 to +10 V
Response Time of Optical Output to Power Control
< 4 µs for Power 10 to 100 %
Frequency 80 MHz
Active H, internal Pull-Down Resistor
Frequency 50 MHz
Active H, internal Pull-Up Resistor
Frequency 20 MHz
Active H, internal Pull-Down Resistor
Device Runs at 50 MHz When Frequency Inputs Unconnected
Power Supply
Power Supply Voltage
+9 V to +15 V
Power Supply Current at 12 V
300 mA to 400 mA
Mechanical Data
Dimensions (width x height x depth)
(40 x 40 x 120) mm
Mounting Thread
four M3 Holes
Heat Sink Requirements
< 2 °C / W 1)
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
0 °C to +40 °C
(1) OEM version without active cooling must be mounted on heat sink. Case temperature must remain below 40 °C.
商品属性 [波长] 270, 310nm [功率] Approximately 50 µW [脉宽] typ. 580 ps, typ. 700 ps [重复频率] 20, 50, 80 MHz