TL-1000 & TL-1000-ASOPS
• Repetition rate stabilisation
• Repetition rate offset locking
• Low residual timing jitter
• ASynchronous Optical Sampling (ASOPS)
• Time Domain Spectroscopy
Overview Laser Quantum offers the timing stabilisation units TL-1000 and TL-1000-ASOPS as accessories to the gigajet series high-speed femtosecond oscillators and the taccor femtosecond laser. The TL-1000 can also be used for stabilisation of the gecco and venteon series of lasers. The TL-1000 allows the tight phase-lock of an oscillator repetition rate to an external reference such as a synthesiser or another mode locked laser, with a residual timing jitter. TL-1000-ASOPS enables a repetition rate offset-lock between two femtosecond oscillators (e.g. two taccor lasers or the oscillators contained in a gigajet TWIN) at a repetition rate difference between 2 kHz and 20 kHz. It also permits synchronisation of two lasers with a jitter below 60 fs (synch. mode). System parameters are accessible via touchscreen and USB port.
Repetition rate stabilisation is essential for applications requiring a well-defined timing relation between a femtosecond oscillator and a reference signal. Such applications are for example two-color pump-probe spectroscopy using two synchronised mode locked lasers, optical experiments synchronised to a pulsed electron source, or high speed asynchronous optical sampling (ASOPS) experiments. ASOPS is an ultra-rapid and precise time-domain spectroscopy technique pioneered by Laser Quantum GmbH, outperforming classical approaches by orders of magnitude in measurement speed and noise performance.
The TL-1000 and TL-1000-ASOPS are specifically designed to serve these applications. Repetition rate fluctuations of a free-running oscillator are efficiently suppressed with a residual timing jitter <100 fs. TL-1000-ASOPS permits high-speed ASOPS based ultrafast time-domain spectroscopy using two femtosecond oscillators with >60 fs time-delay resolution.
Optional features
Low timing jitter option
The low timing jitter option is available for the TL-1000 timing stabilisation unit when used with lasers that have a repetition rate of >333 MHz, suppressing timing jitter to typically ≤10 fs ( 10 Hz to 100 kHz). A suitable 10 GHz reference synthesiser must be provided by the customer. Stabilisation is performed at higher repetition rate harmonic.
ASOPS experiment support
The TL-1000-ASOPS is capable of driving and monitoring a PR-130 photoreceiver and a Tera-SED THz emitter element via its umbilical port. This feature is beneficial for highspeed ASOPS experiments.
The TL-1000-ASOPS controls the time delay between pump and probe pulses by slightly differing repetition rates (fR ~1 GHz). The difference in ΔfR determines the scan rate, while the measurement window is given by the inverse of the repetition rate I/fR=1ns. Here, ΔfR is 10 kHz, i.e. the time-delay is repetitively ramped with a 100 µs period.
This high-speed ASOPS scheme is used in the Laser Quantum HASSP-THz spectroscopy system to obtain spectral resolution of 1 GHz.
Specifications*
TL-1000
TL-1000 (Low jitter)
Repetition Rate range1
75 MHz to 10 GHz
75 MHz to 10 GHz
Timing jitter2,3: taccor/helixx models
≤100 fs (10 Hz to 100 kHz)
≤10 fs (10 Hz to 100 kHz)
Timing jitter2,3: venteon/gecco models
≤300 fs (10 Hz to 100 kHz)
≤100 fs (10 Hz to 100 kHz)
Power requirements
110 or 220 VAC (60/50 Hz)
TL-1000 ASOPS
Repetition Rate range4
79.68 MHz to 80.32 MHz 249 MHz to 251 MHz 498 MHz to 502 MHz
0.996 GHz to 1.004 GHz
Timing jitter in synch. mode3
<60 fs (10 Hz to 100 kHz)
Repetition Rate offset
0 (synch. mode) or 2 kHz to 20 kHz
Time resolution in ASOPS
<60 fs
Trigger signal
TTL level at offset frequency, ≤10 ns rise time
Power requirements4
110 or 220 VAC (60/50 Hz)
1 Below 333 MHz repetition rate the customer supplied reference signal must be at a repetition rate harmonic with frequency above 333 MHz.
2 Relative to customer provided signal at +7 dBm (50 Ohm) with <-125 dBc/Hz phase-noise above 10 kHz offset from carrier. Reference signal must be at the repetition rate harmonic nearest 10 GHz for the low jitter version.
3 If used with a Laser Quantum femtosecond oscillator and suitable built-in piezo supported cavity mirror(s).
4 Ranges must be selected upon order.
Dimensions (mm)