BIOLIT 2 
Femtosecond Fiber Laser for Biophotonics
1050 nm, 70 fs, 2 W, 10 – 50 MHz
Standout features:
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Ultra-short and clean pulses
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Robust and stable
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Flexible repetition rate
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Maintenance-free & turn-key
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Integrated dispersion pre-compensation
Applications:
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Multiphoton microscopy
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Photopolymerization
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Ophthalmology
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OPO pumping
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Neuroscience
Clean pulses lead to sharp images
The Biolit 2 is a compact, air-cooled femtosecond laser designed for
multiphoton microscopy, biophotonics and other non-linear optics applications.
The industrial-grade device is exceptionally robust, maintenance-free and
affordable.
A combination of ultra short (typ 55 fs) and clean pulses with
integrated dispersion compensation, excellent beam quality and optimized
repetition rate enables unparalleled quality multiphoton imaging while
preserving the object.
| Specifications | Model |
|---|---|
| Biolit 2 | |
| Central wavelength | 1050 ± 5 nm |
| Average power | > 2 W |
| Pulse duration | < 70 fs (typ. 55 fs) |
| Pulse duration stability 1) | < +/- 3 fs |
| Pulse strehl ratio | > 0.9 |
| Tunable dispersion pre-compensation 2) | -6 000 fs² ... +500 fs² |
| Pulse repetition rate 3) | 10 - 50 MHz |
| Analog power control 4) | 1 - 100% |
| Beam quality | M² < 1.2 (typ. 1.05) |
| Beam circularity 5) | > 0.9 (typ. 0.94) |
| Beam diameter (1/e² level) | 1.5 ± 0.3 mm |
| Beam divergence (full angle) | < 1.5 mrad |
| Beam pointing (RMS) 1) | < 20 μrad |
| Beam pointing vs temp. | < 15 μrad/°C |
| Pulse Energy Stability (RMS) 6) | < 1% |
| Power Stability (RMS) 1) | < 1% |
| Warm-up time (cold start) | < 10 min |
| Available control interfaces | USB, CAN |
| Tuneable pulse repetition rate option 7) | 1 – 20 MHz |
| Second harmonic option | 0.4 W @ 525 nm |
| Operating voltage | 24V, 8A (100...240 V AC, 47...63 Hz to 24V AC/DC converter included) |
| Operating temperature | 18 – 35 °C |
| Humidity | non condensing |
| Transportation/storage temperature | - 20 °C – +70 °C |
| Cooling: Laser head Control unit | air (passive) forced air (fans) |
| Dimensions: Laser head (L x W x H) Control unit (L x W x H) | 313 x 152 x 107 mm 449 x 370 x 140 mm |
| Umbilical length | 3 ± 0.1 m |
1) Measured during 8 h operation starting 30 minutes after warm-up. Environmental temperature stability within ± 1 °C.
2) Equivalent of 80 mm of SF10 glass. Even higher dispersion (up to 30’000 fs2) of the external optical system can be pre-compensated in the factory on request. For other pre-compensation options, please contact LITILIT.
3) Factory preset.
4) Attenuation can be controlled in a few different regimes: a) by PC user interface, b) by CAN register, c) by analog input signal (> 5 kHz bandwidth). Beam quality specifications are maintained down to 10% power level.
5) Defined as the worst case beam ellipticity along the z-scan (± 5 × LRayleigh) of the beam.
6) Measured within 10 s time interval.
7) Output repetition rate can be described by formula RR = RR0/ N, where RR0 is fundamental repetition rate and N is integer number. Output power is dependent on both RR and RR0. For power dependence on the repetition rate please contact LITILIT.
8) Biolit-2 SH model also has infrared (1050 nm) output with the same specifications as standard Biolit laser. Both outputs are available simultaneously. Please inquire directly LITILIT for more information.
World patented technology: US10038297, JP6276471, EP3178137, CN106575849.
Measured autocorrelation function of the pulses from Biolit 2 laser
Beam diameter dependence on propagation distance (z-scan) of Biolit 2 laser and M² fit
Long term power stability of Biolit 2 laser (at 1050 nm)
Output spectrum from Biolit 2 laser
Drawing of Biolit 2 laser head (in mm)
Drawing of Biolit 2 control unit (in mm)
