Menlo Systems Synchronization & ASOPS Systems
The asynchronous optical sampling (ASOPS) technique allows high-speed scanning over some nanoseconds of time delay without a mechanical delay line. The SYNCRO-RRE, also available as stand-alone unit, provides state-of-the art phase lock electronics.
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- ASOPS
| ASOPS DUAL COLOR | ASOPS TWIN | |
| Repetition Rate | 100 MHz | 250 MHz |
| Repetition rate offset tuning | Δf = -10 kHz .. + 10 kHz, in steps of 10-5 Hz | Δf = -10 kHz .. + 10 kHz, in steps of 10-5 Hz |
| Time measurement window | 10 ns | 4 ns |
| Scan duration 1/ Δf | 0.1 ms @ 10kHz offset, 1 s @ 1 Hz offset | 0.1 ms @ 10kHz offset, 1 s @ 1 Hz offset |
| Data Point Increment Δf / Rep² | 1 ps @ 10 kHz, 0.1 fs @ 1 Hz | 160 fs @ 10 kHz, 0.016 fs @ 1 Hz |
| Laser Heads | ||
| Central Wavelength | 1560 nm / 780 nm | 1560 nm |
| Average Power | >100 mW / >100 mW | >75 mW / >75 mW |
| Pulse Energy | >0.4 nJ | >10 nJ |
| Pulse Width | <90 fs / <120 fs | <150 fs / <150 fs (after 6-m PM fiber) |
| Output Port | 2 x free space | 2 x fiber-coupled FC/APC |
| Piezo Tuning Range | >100 Hz | >625 Hz |
| Piezo Bandwidth | >30 kHz | >30 kHz |
| Stepper Motor Turning Range | >330 kHz | >2 MHz |
| Trigger Signal | TTL level at offset frequency, <10 ns rise time | TTL level at offset frequency, <10 ns rise time |
- RRE-SYNCRO
| RRE-SYNCRO | |
| RMS Timing Jitter | <200 fs [0.1 Hz–500 kHz] or same as reference, whichever applies first* |
| INPUT SIGNALS | |
| External Reference options | Master signal at repetition rate |
| Harmonic Master signal (RF or optical) | |
| 10 MHz (provided by customer or generated internally) | |
| Repetition Rate | Signal level -20…-10 dBm |
| OUTPUT SIGNALS | |
| Stepper Motor | Stepper motor control, Sub-D, 9 pin |
| Piezo | Piezo control, BNO |
| Error | Error signal for monitoring, BNC |
- Optical Sampling Engine
| Repetition Rate | 100 MHz |
| Repetition Rate Offset Tuning Range | Δf = -10 kHz .. + 10 kHz, in steps of 10-5 Hz |
| Time Measurement Window* | 10 ns |
| Data Point Increment ** | 1 ps @ 10 kHz, 0.1 fs @ 1 Hz |
| RMS Timing Jitter (0.1 Hz -500 kHz) | <150 fs |
| RF Reference | external or internal 10 MHz reference |
| Laser Heads | |
| Wavelength | 1560 nm |
| Average Output Power | >100 mW (from each laser) |
| Output Port | fiber-coupled FC/APC |
| Pulse Length | <90 fs after 1 m PM fiber |
| Trigger Signal | TTL level at offset frequency, <10 ns rise time |
- ASOPS
In time-resolved measurements an ultrafast pulse triggers a reaction and a second pulse takes a snapshot of the induced change. By shifting the arrival time of the probe pulse with respect to the pump pulse the stimulated process can be followed in time.The asynchronous optical sampling technique allows high-speed scanning over some nanoseconds of time delay without a mechanical delay line. The ultrafast lasers delivering the pump and probe pulses are locked together at a tunable repetition rate difference.
The lasers can be also locked to the same repetition rate value and by shifting the relative phase between the laser pulses, the system will allow measurements in a reduced time window of some 100 ps. Switching between the two modes of operation can be done at the touch of a button.
- RRE-SYNCRO
The main application is the synchronization of a pulsed laser to a radio frequency reference, derived from a radio frequency clock or an optical reference clock. An embedded microcontroller for the stepper motor and Piezo control in laser cavity ensures long-term stability.
- Optical Sampling Engine
In time-resolved measurements, an ultrafast pulse triggers a reaction and a second pulse takes a snapshot of the induced change. By shifting the arrival time of the probe pulse with respect to the pump pulse the stimulated process can be followed in time. The OSE is a one-of-a-kind compact Optical Sampling Engine that includes two femtosecond Erbium fiber lasers, synchronized with a high-accuracy phase-locking electronics. It allows for high-speed scanning over many nanoseconds of time delay without a mechanical delay line. In just 19” 3U, it features a fully automated turn-key asynchronous optical sampling system (ASOPS).
The ultrafast lasers delivering the pump and probe pulses are locked together at a tunable repetition rate difference. An optically generated TTL trigger output is integrated for triggering customer data acquisition devices. Due to its modular design, the OSE is the most versatile dual laser system on the market: Additional external modules are retrofittable, to provide higher powers, customized spectra and pulse lengths. The underlying proprietary technology based on figure 9® lasers is well-suited even for demanding environments.
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