In the fields of laser physics, quantum research, nuclear physics experiments, and precision metrology, precise control and measurement of time intervals are crucial for experimental success. The Stanford Research Systems (SRS) SR620 Digital Delay Generator and Time Interval Analyzer, with its femtosecond-level time resolution, exceptional stability, and flexible trigger configuration, has become an industry-standard tool for applications such as time-correlated single-photon counting and pump-probe experiments.
To ensure that such precision timing instruments continue to deliver unparalleled performance, professional calibration and maintenance support are indispensable. The Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department, with its profound technical expertise in servicing research-grade precision instruments, provides professional technical support and service assurance for SR620 users.
SR620: Defining Time Precision and Flexibility
Core Performance and Technical Features:
Unmatched Time Resolution and Accuracy:
Single-shot time interval measurement resolution up to 25 ps (RMS), and < 5 ps in averaging mode.
Time interval measurement range from 0 to 1000 seconds, offering an extremely wide dynamic range.
Typical time accuracy of ± (50 ps + time interval × 0.5 ppm), meeting the most stringent experimental requirements.
Flexible Channel Configuration and Delay/Pulse Generation:
Provides 2 delay channels with a delay range of 0 to 1000 seconds and a resolution of 5 ps.
Each channel can be independently configured for positive/negative delay and can output a pulse or level.
Pulse width, output level (±3V), and polarity are independently programmable to accommodate various driving needs.
Powerful Triggering and Gating Functions:
Supports internal, external, or manual trigger modes, with a trigger rate of up to 2 MHz.
Features advanced functions such as pre-trigger delay, gated output, and trigger enable.
All 4 input channels are equipped with programmable trigger levels (±2.5V) and slope selection.
Advanced Analysis and Connectivity Capabilities:
Built-in statistical histogram analysis, frequency measurement (up to 1.3 GHz), and period measurement functions.
Standard GPIB (IEEE-488) and RS-232 interfaces for easy integration into automated experimental systems.
Intuitive front-panel operation with a high-resolution display for real-time monitoring of timing parameters.
Typical Application Scenarios:
Time-Correlated Single-Photon Counting (TCSPC): Precisely recording photon arrival times in fluorescence lifetime measurements and quantum optics.
Pump-Probe Spectroscopy: Precisely controlling the delay between pump and probe pulses to study ultrafast dynamics.
LIDAR and Time-of-Flight Measurements: Accurately measuring the round-trip time of laser pulses for distance measurement and 3D imaging.
Particle Physics and Nuclear Physics Experiments: Providing precise timing triggers and coincidence measurements for detector arrays.
Professional Calibration Ensures Traceability of the Time Base
The core performance of the SR620 relies on the absolute accuracy of its internal time base (oscillator). The long-term stability of its crystal oscillator, temperature drift characteristics, and delays throughout the measurement chain all affect the accuracy of the measurement results. Regular professional calibration is the cornerstone for ensuring the accuracy and reliability of its time data.
The Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department provides key support to users in this area:
Precision Time Base Calibration: Calibrating and tracing the internal time base of the SR620 (including its 10 MHz reference input/output) using a rubidium standard or GPS-disciplined high-stability oscillator as a reference, ensuring its frequency and long-term stability comply with specifications.
Time Interval Measurement Accuracy Calibration: Systematically calibrating the measurement accuracy of all input channels of the instrument across different time intervals, verifying its picosecond-level resolution capability.
Delay Output Accuracy Verification: Verifying the output pulse timing accuracy of the two delay channels, ensuring the consistency between the programmed delay and the actual output.
Fault Diagnosis and Performance Optimization: Providing professional diagnosis and repair for faults such as trigger failure, measurement deviation, and display abnormalities, restoring the instrument to its optimal performance.
Conclusion
The Stanford Research Systems SR620, with its exceptional timing capabilities on the picosecond and femtosecond scales, has become an indispensable "metronome" in numerous cutting-edge scientific experiments. Its precision and flexibility enable the exploration of material behavior at extremely short time scales.
Ensuring that every "beat" of this precision "metronome" is accurate requires extremely high professional technical capability. By partnering with professional service providers like the Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department, research users can ensure that their SR620 maintains top-tier performance throughout its entire lifecycle, thereby providing the most reliable temporal data foundation for exploring the unknown world.
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