OA. Optical Attenuators
|Dynamic attenuation range||>102|
|Input pulse duration||<50 fs||>50 fs||>70 fs|
|Central wavelength* (fixed)||800-1100** nm||350-2000 nm||343-350, 450-1600 nm|
|Bandwidth*** (% of central wavelength)||5%||10-12%|
|Clear aperture||<10 mm||<6 mm||<10 mm||<9 mm||<15 mm|
|Beam deflection||40 mm (walk-off)||<1 mrad|
|Damage threshold||10 J/cm2||5 J/cm2||10 J/cm2|
|Note: models with the "-S" index are driven by a step motor, transmission change for motorized models: 0.1% per step;
models with the "-М" index are manually driven; models with the "-MK" index are manually driven and have additional side knob;
* - please specify a certain value from the given range with your request; usual wavelenths are 515, 800, 1030 nm;
** - order of thin-film polarizers for wavelengths of 250-800 nm is possible on request;
*** - depends on central wavelength.
The OA optical attenuator family is designed to attenuate laser radiation with more than 100:1 ratio. An optical attnuator unit features an optomechanical assembly with a zero-order half-wave plate that is being rotated and a system of polarizers. The type of the polarizers used depends on actual application: thin-film mirror polarizers for the OAFP model, Glan laser prisms for the OAGP model and polarizing beamsplitter cubes (PBS) for the OABS model.
The OAFP model comprises a thin zero-order half-wave phaseplate and two mirror polarizers that select the input pulse according to polarization. This model has been specially developed for pulsed femtosecond radiation (<50 fs) as it introduces as little dispersion to the pulse as possible.
For longer pulse durations we offer the OAGP model, which has better transmission ratio as a Glan prism is used to simplify the scheme, or the OABS model that incorporates a PBS cube.
The attenuator comes in manual (-M/-MK) or step-motor driven (-S) modification with a USB interface and a controller with Windows PC software.
TiF-100ST-F6 femtosecond Ti:S oscillator with Frep locking for multiphoton microscopy at CANDLE, Armenia
The TiF-100ST-F6 femtosecond Ti:S oscillator with a built-in pump laser, also equipped with the ALock PLL electronics unit for pulse repetition rate locking to an external RF source has been installed at the Synchrotron Research Institute’s CANDLE facility in Armenia. The setup has been developed and commercialized during the joint Russia-Armenia project supported by FASIE (Innovation […]
Avesta will be participating in LASER World of Photonics 2019 trade show in Munich on June 24-27, our booth number is B3/338 (part of a joint Russian exposition space).