High Precision Repetition Rate stabilization
- Ultra-low timing jitter
- Hands-free operation
- Maximum flexibility
- Long term stability
Femtolock™ 2 is a sub-100 fs jitter synchronization unit for Element™ 2 and Synergy™ ultrafast Ti:Sapphire oscillators. It allows locking of the round-trip frequency of oscillator pulses to a given reference RF-source. The use of multiple harmonics of the resonator round-trip frequency in combination with a simple and passively stable femtosecond laser resonator (based on Dispersive Mirror technology) enables low jitter levels.*
Access to the loop filter settings allows the user to optimize the timing jitter and to adapt to different applications. Femtolock 2 enables synchronization of the laser’s repetition rate by locking on the fundamental input RF-frequency, on one of its higher harmonics or to easily switch between the two. Optionally, a dual piezo configuration provides precise synchronization by simultaneously locking on both fundamental and harmonic of the input RF-frequency. Femtolock 2 can be custom designed to meet your specific requirements in terms of frequency and configuration.
The system is based on a combination of fast piezo translator(s) (PZT) and a wide range translation stage. This arrangement allows the Femtolock 2 to compensate for fast fluctuations (kHz), as well as for slow or medium long term drifts (e.g. temperature drifts). The unique configuration ensures resonance-free synchronization up to high frequencies and guarantees a long term drift-free operation.
* Adapted from G.M.H. Knippels et al. “Two color facility based on a broadly tunable free-electron laser and a sub-picosecond-synchronized 10-fs Ti:Sapphire laser” Optics Letters, Vol. 23, No. 22, Nov. 15, 1998.
|Synchronization to clock signals|
|Integrated Timing Jitter (1 Hz–1 MHz)2||<100 fs
|RF Reference Input Requirements|
|Frequency Range (nth harmonic of the repetition rate)3||350 MHz–1.5 GHz
|Input Level @ 50 Ohm||7 dBm|
|User Interface (W x D x H)||16.65 x 15.48 x 3.5 in (423 x 400 x 89 mm) (19" 2U standard)|
|Actuator(L x W x H)||1.97 x 0.98 x 1.97 in (50 x 25 x 50 mm)|
|Detector Head(L x W x H)||1.97 x 0.79 x 1.18 in (50 x 20 x 30 mm)|
1. Due to our continuous improvement program, specifications are subject to change without notice.
2. The jitter cannot be smaller than reference source. Specification applies to Element 2 and Synergy oscillators.
3. For synchronization to RF frequencies >1.5 GHz, please contact Spectra-Physics.
Femotlock 2 Dimensions