High-speed picosecond laser
Keywords:
High-speed picosecond laser
Product Overview
The high-speed picosecond laser is an instrument widely used in scientific research fields such as laser ranging, optical measurement, and fluorescence lifetime analysis. In recent years, with the development of quantum cryptography, the high-speed picosecond laser has emerged as a core device for generating quantum signals, serving as a single-photon source.
The WT-LD series lasers are optical instruments derived from quantum cryptographic communication systems. They feature low cost, high repetition rate, ultra-narrow pulses, and high stability. Integrating both continuous-wave lasers and ultra-narrow, high-frequency pulsed lasers, these devices represent one of the few high-performance lasers available domestically and internationally that can achieve GHz frequencies with pulse widths on the picosecond scale. The equipment supports multiple standard and custom-level inputs, including LVTTL, LVPECL, NECL, and CML. Thanks to its built-in precision temperature-control circuit, the laser tube’s output wavelength fluctuation is kept below 0.1 nm.
Main features
● Ultra-high repetition rate: 1 GHz / 1.25 GHz
● Ultra-wide pulse width adjustment range: 50–2000 ps
● Ultra-low time-jitter standard deviation: ≤10 ps
● Ultra-narrow laser linewidth: ≤0.9 nm (@-20 dB, 125 MHz, 200 ps)
● High stability: Constant-temperature control design eliminates the impact of temperature drift.
● Multiple operating modes: Supports pulse mode and continuous mode.
● Multiple trigger modes: Supports internal triggering and external triggering.
Product Parameters
| Parameter Name | Minimum | Typical | Maximum | Unit | |
| Wavelength* | 1550 | nm | |||
| Trigger frequency | External trigger | 1250 | MHz | ||
| Internal trigger | 5 | 1250 | MHz | ||
| Optical pulse width | Fixed pattern | 50 | 2000 | P.S. | |
| Custom Mode | 0.1 | 2000 | ns | ||
| Continuous optical power | Fixed pattern | 1 | 2 | 5 | mW |
| Custom Mode | 1 | 5 | mW | ||
| Delay adjustment range | 0 | 4.5 | ns | ||
| Delay adjustment step size | 5 | P.S. | |||
| Storage temperature | -15 | 55 | Celsius | ||
| Operating temperature | 0 | 40 | Celsius | ||
| Chassis dimensions (W×H×D) | 275×138×360 | mm | |||
| Power supply | 100 | 240 | Vacuum | ||
| Power | 30 | W | |||
Product Waveform Diagram
Spectral waveform diagram (500 ps)
Optical Time-Domain Waveform (50 ps, 1 GHz)
Scope of application
● Quantum Cryptographic Communication
● Quantum Optics
● Laser rangefinding
● Optical measurement
● Fluorescence Lifetime Analysis
● Fiber Optic Feature Analysis
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