ANTAUS. Yb-Doped Amplified Femtosecond Fiber Laser

Femtosecond Yb-doped microjoule fiber laser with a fiber amplifier stage. Combines high pulse energy with significantly high repetition rate.
  ANTAUS-10W-4u/2.5M ANTAUS-20W-xx/xx ANTAUS-40W-xx/xx
Central wavelength 1030±5 nm (fixed; 1040 and 1050 nm upon request)
Average output power >10 W >20 W >40 W
Pulse duration* (FWHM) <220 fs
(typical 190-200 fs)
<250 fs
(typical 200-220 fs)
<280 fs
(typical 220-240 fs)
Pulse energy >4 uJ >20 uJ / >40** uJ >40 uJ / >60** uJ
Pulse peak power >18 MW >75 MW / >150** MW >130 MW / >200** MW
SHG module (optional) 515±2 nm; >40% typical conversion efficiency
Pulse repetition rate***
200 kHz...2.5 MHz 200 kHz...1 MHz 200 kHz...1 MHz
Output pulse slicer
(optional, user-adjustable)
single-shot...1.8 MHz single-shot...1 MHz single-shot...1 MHz
Built-in power attenuator
(optional, user-adjustable)
Output polarization linear, vertical
Output type and mode free-space, TEM00, M^2 <1.2
Long-term stability <1% rms (during 24 hours at equal ambient conditions)
Burst mode conventional burst mode: included;  optional: ~25 ns intraburst pulse distance
Remote output control Interfaces: USB, CAN, RS485, Ethernet; PC software for Windows; optional: attenuator analog in
Optical unit dimensions 341x172x115 mm 383х240х122 mm 450х450х160 mm
Control unit dimensions 483x320x140 mm (3U 19") 483x380x140 mm (3U 19") 483x440x140 mm (3U 19")
Closed-loop water chiller no, air cooling (water optional) no, air cooling (water optional) 430x340x190 mm
* - pulse duration tuning up to 10 ps on request; quoted pulse duration <200 fs on request;
** - high-energy versions, please enquire;
*** - without pulse slicer or with the pulse slicer bypassed; up to 75 MHz upper limit on request; Frep sync to an external reference or Fceo locking on request.

The ANTAUS microjoule ultrafast fiber laser engine features high pulse energy along with fast repetition rate, which is an ideal combination for subtle material processing applications, as well as for many kinds of scientific research. Unlike most of the competition, the ANTAUS features short pulse duration and near-perfect AC trace with almost no pulse pedestal. The system is an all-Yb-doped-fiber oscillator + amplifier with a free-space final pulse compressor. Such design architecture ensures greater stability and true turn-key operation with no maintenance as well as the highest possible output pulse energy and spatial beam quality. The output repetition rate of the system is user-adjustable in a certain range of frequencies and may be increased into tens of MHz range on custom basis. The repetition rate of any model may be modulated from single-shot via an optional output pulse slicer. The system may also include an optional feedback loop for a built-in attenuator for stabilization of the output power by an external photodetector signal. The ANTAUS systems may optionally be upgraded with the ALock PLL locking electronics for Frep syncing or Fceo locking.

The basic models of the ANTAUS family are:

The ANTAUS-10W-4u/2.5M has the smallest single pulse energy from the three, however, the average power of the system is still on par with the other two models and offers high flexibility of application, while the default output repetition rate is the highest of all three systems.

The ANTAUS-20W series has the optimal set of output parameters: significant output power, higher pulse energy and fast repetition rate.

The ANTAUS-40W series feature the highest output power and pulse energy of all the units and are suitable for power-demanding and energy-eating applications like multistage OPO and OPA pumping.

Any system can be upgraded with a novel dense-burst mode in which it can produce a burst of closely spaced pulses (~25 ns intrapulse distance) with total burst energy being much higher than the energy of a single pulse. This mode is beneficial for certain micromachining and surface structuring applications.

The laser is already being used by our customers as an OEM laser source in ophthalmology (in LASIK-type eyesight correction apparatus), as well as for THz studies, surface modification, two-photon polymerization techniques and many more. The models with up to 20 W do not require any water-cooling and feature convective cooling of the power supply unit which facilitates integration in any third-party equipment.

Please contact us to find out more about the price for the ANTAUS femtosecond fiber laser system, in order to get a budgetary quote or buy such a unit.

- built-in output acousto-optic pulse slicer for repetition rate control and system gating by an input analog TTL signal;
- tunable output pulse duration up to several ps;
- system modification for <200 fs performance;
- additional component integration, adapatation of system's protocols for customer equipment;
- multichannel synchronized systems (also with synchronized OPAs, OPOs, Ti:S, Yb, Cr:F lasers).

Q: What is the dense burst mode?
A: In this mode the internal pulse picker in the seed oscillator lets several subsequent seed pulses to be injected into the fiber amplifier. The temporal distance between these pulses would be determined by the repetition rate of the seed oscillator, which is usually in the range of 30-80 MHz depending on the exact system (i.e. ~33...12 ns distance between the pulses). The number of such subsequent pulses constituting such a dense burst is determined by the system's settings and is discussed separately prior to ordering, as such mode is optional. This is in contrast with ordinary burst mode in which the temporal distance between pulses is determined by the output pulse repetition rate of the amplifier, which in case of 1 MHz setting would be 1 us.

Q: Is the system air-cooled or water-cooled?
A: The systems with up to 20 W average power output are generally air-cooled (if not indicated otherwise in your quotation), with water cooling available for harsh or controlled environments. The systems with >20 W are supplied with a water-to-air closed-loop chiller system. Water-to-water solutions are available upon request.

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