Variable Attenuator for Femtosecond laser pulses VAFS-ST
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Divides laser beam into two parallel beams of manually
adjustable intensity ratio
Low dispersion for femtosecond and high energy laser pulses
Large dynamic range
Negligible beam deviation
High Optical damage threshold |
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This variable attenuator/beamsplitter consists of 2
high-performance polarizing optics components placed in precision opto-mechanical
holder. The variable attenuator/beamsplitter incorporates 2 high-performance
Brewster type polarizers, which reflect s-polarized light while transmitting
p-polarized light. These two Brewster type polarizers are housed in
specially designed opto-mechanical adapter. This adapter allows to use round
shape or rectangular shape Brewster type polarizers.
A rotating quartz λ/2 waveplate is placed in the incident polarized laser
beam. The intensity ratio of those two beams may be continuously varied
without alteration of other beam parameters by rotating the waveplate. The
intensity of either exit beam, or their intensity ratio, can be controlled
over a wide dynamic range. P-polarization could be selected for maximum
transmission, or high-purity s-polarization could be reflected when maximum
attenuation of the transmitted beam takes place. |
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Specifications
| Central wavelengths |
780, 800, 1064 nm or other |
| Beam deviation |
40*10^(-6) rad, average over range |
| Aperture diameter |
20 mm |
| Damage Threshold |
1 J/cm2 pulsed at 1064 nm, typical |
| Antireflection Coating |
R <0.25% all entrance and exit surfaces |
| Time dispersion |
t<4fs for Ti:Sapphire laser pulses |
| Polarization Contrast (after 1st polarizer) |
1:190 |
| Polarization Contrast (after 2nd polarizer) |
1:7000 |
Del Mar Photonics
Femtosecond Ti:Sapphire oscillators and
amplifiers from Del Mar Photonics
Do you plan to build a femtosecond set up based on Ti:Sapphire laser?
Del Mar Photonics is please to announce several new Ti:Sapphire oscillator
and amplifier products. Now Del Mar Photonics' customers can choose one of the
following oscillator and amplifier options:
Femtosecond Ti:Sapphire Oscillator
1. If you already have a CW pump laser or plan to buy specific model and need
only Ti:Sapphire oscillator we can offer our stand alone Ti:Sapphire lasers
Trestles, that do not include
pump laser and can be customized for any suitable CW pump.
Please indicate required pulse duration (standard models have 20 fs, 50 fs
and 100 fs pulses) and tuning range. Let us know what kind of pump laser you
have (make/model) so we can confirm what output parameters can be achieved.
2. If you do not have a pump laser and want to buy complete system we can
offer you one of the following:
One-box system Trestles Finesse that
include Trestles mini Ti:Sapphire oscillator and built in
DPSS pump laser
When choosing specific Trestles Finesse model please indicate required CW
pump power (4W or 6W), Ti:Sapphire pulse duration and required tuning range (or
tuning range, where you want to achieve maximum performance)
Tuning range can be customized at the factory by choosing one of standard or
custom made optics set. Typical tuning curves for 4W CW pump laser for two
standard optics sets are shown in the
Trestles Finesse brochure. For example, with 4W CW pump laser and long-wave
mirrors set tuning range can be extended up to 940nm. With 6W CW pump laser
tuning range can be extended up to 980nm.
Femtosecond Ti:Sapphire Amplifier
1. We offer integrated oscillator/amplifier system
Teahupoo Rider. Teahupoo Rider is a fully-integrated all-in-one-box system
that includes Trestles Finesse oscillator
or Buccaneer SHG diode-pumped fiber oscillator,
pulse stretcher, regenerative amplifier pumped by
multi kHz Nd:YAG pump laser and pulse compressor. Teahupoo Rider has a
factory preinstalled repetition rate of 2, 5 or 10kHz and ideal for low cost
femtosecond micromachining systems, OPA pumping, ultrafast spectroscopy and
variety of applications in life sciences.
2. If you already have a Ti:Sapphire oscillator, we can offer you stand alone
Ti:Sapphire amplifier. Two standard models are available:
Wedge M multipass or Wedge R
regenerative.
Each amplifier is customized to the customer's amplifier pump laser.
2. Custom Teahupoo Rider systems with a pump
laser of your choice are also available. Depending on the required
specifications we can recommend a pump laser and make required adjustments for
optimum performance.
The following specifications can be achieved:
Repetition rate: single pulses, 10 Hz up to 10kHz
Pulse duration: 100fs, 50fs, 30fs, <30fs
Pulse energy: from 100 mJ per pulse to few mJ per
pulse
Tunability: both fixed wavelength and tunable options are available - please
indicate required tuning range.
Del Mar Photonics