OSE
(Optical Sampling Engine with Two Femtosecond Fiber Lasers)
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.
Features
- High-speed Electronic Sampling
- Full Automation
- LAN-Interface (full Remote Control)
- 10 MHz Internal Reference
- Ultrafast Repetition Rate Actuator
- No Moving Mechanical Components
- Fiber-coupled Optical Outputs (PM)
Key Specifications
- Synchronized Dual Laser System
- Time Measurement Window 10 ns (pulse-to-pulse)
- Repetition Rate 100 MHz
- Central Wavelength 1560 nm
- Pulse Width <90 fs
Applications
- THz Time-Domain Spectroscopy
- THz Frequency Comb Spectroscopy
- Photo Acoustics
- High-Resoluton Frequency Domain Spectroscopy
- Transient Absorption Spectroscopy
- Material Characterization
Options
- VARIO User-Defined Repetition Rate
Factory-set; possible values 50, 62.5, 100, 125 MHz
- MULTIBRANCH Additional Seed Ports
Seeding of multiple amplifiers with optional subsequent frequency conversion to cover multiple wavelengths
- External Amplifiers
- Rack- and Table-Mounted Extensions
Schematic Setup
Complete Solution:
The turn-key, fully hands-off optical setup is integrated into a 19” 3U rack, and offers unprecedented compactness.
The embedded platform ensures automatic laser stabilization.
Changes of the operation mode can be done through the front screen, or be remote control over network by a browser-based graphical user interface.
For convenience, the system offers a TTL trigger signal. Additionally, the OSE can provide additional outputs as a seed to pump external amplifiers.
Specifications
| Repetition Rate | 100 MHz |
| Repetition Rate Offset Tuning Range | Δ f = -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 |
Specifications Laserheads
| Wavelength | 1560 nm |
| Average Output Power | >100 mW (from each laser) |
| Output Ports | fiber-coupled FC/APC |
| Pulse Length | <90 fs after 1 m PM fiber |
| Trigger Signal | TTL level at offset frequency, <10 ns rise time |
*Scales with the repetition rate.
**Scales with the ratio of the repetition rate offset and the repetition rate squared (Δ f/fᵣ²).
Requirements
| Operating Voltage | 110/115/230 VAC |
| Frequency | 50 to 60 Hz |
| Power Consumption | <100 W |
| Cooling Requirements | none |
| Operating Temperature | 22 ± 5 °C |
| Optical Unit Dimensions/Weight | 19” x 3U, 17 kg |
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