CrF. Femtosecond Cr:F Solid-State Oscillator

Ultrafast solid-state mode-locked laser system based on unique chromium-forsterite medium. The system is used to provide tunable femtosecond laser radiation around 1250 nm.
  CrF-450TP CrF-400SP CrF-700SP CrF-700SP-L
Pulse duration
<65* fs <75 fs <140 fs
Tuning range
1230-1270 nm (tunable) 1230...1270 nm (fixed) 1265+/-15 nm (fixed)
Output average power
>450** mW >400 mW >700 mW >560 mW
Pulse energy
>4 nJ >4 nJ >7 nJ >20 nJ
Pump laser power
15 W
Repetition rate (fixed)
96 MHz 95 MHz 30+/-2 MHz
Mode-locking maintenance
automatic starter
self-starting (SESAM)
Long-term stability
<2% rms <5% rms
Spatial mode
Output polarization
linear, horizontal
Beam divergence
<2 mrad
Crystal cooling and breadboard stabilization
thermoelectric + closed-loop water chiller
* - down to 35 fs pulse duration is available upon request;
** - up to 800 mW average power (model CrF-800TP) is available upon request.

The CrF chromium-forsterite laser offers a unique active medium that radiates femtosecond pulses around 1250 nm. The 1250 nm region offers new horizons for multiphoton microscopy for brain and heart tissue studies.

The laser features an integrated Peltier TE-unit for crystal cooling to lower-than-room temperatures for higher average output optical power and precise temperature control. Three models of the laser feature SESAM self-starting with a fixed wavelength operation and one model features an electromagnetic starter and offers wavelength tunability. The CrF includes a built-in 15-W fiber pump laser and control unit.  CW version of the CrF is available separately as the CrF-CW laser.

The CrF laser can also be used as a seed oscillator for building high power FREGAT Cr:F amplifiers also offered by our company.

PRE: dispersion pre-compensation solution is supplied with the system. The unit introduces tunable negative dispersion into the beam in order to compensate for subsequent passage through complex optical systems with positive dispersion. See APC pulse compressor page for more information.

CH: the system can be equipped with a closed-loop chiller at factory. A third-party solution may also be purchased by the customer separately.

Q: Does the system include a pump laser?
A: The system's standard package includes a matched fiber pump laser. A third-party pump laser might be used upon consultations and approval from us.


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Ultrafast Phenomena 2018 in Hamburg (15-20 July)

Avesta is participating in Ultrafast Phenomena 2018 conference and tabletop exhibition in Hamburg, Germany (15-20 July). We would be glad to discuss any of the ongoing and future projects with the ultrafast community at our tabletop. Hope to see you soon!

New Year Holidays: 30 Dec 2017 – 08 Jan 2018

Avesta’s facilities will be closed for the New Year break from 30 Dec 2017 till 08 Jan 2018. We will resume all operations on 09 Jan 2018. However, we hope to provide periodic e-mail correspondence during the holidays. We wish you a fruitful and prosperous Year 2018!