OA. Optical Attenuators
• Dedicated low-GVD model for <50 fs ultrashort pulses
• Motorized versions with USB interface or manual adjustment
• Continuous power adjustment
• 250 to 2000 nm possible wavelengths
• Damage threshold up to 10 J/cm^2
Product overview
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.
OAFP-10-S
OAFP-10-M
OAFP-10-MK
ОAGP-6-S
ОAGP-6-M
ОAGP-6-MK
ОAGP-10-S
ОAGP-10-M
ОAGP-10-MK
ОABS-9-S
ОABS-9-M
ОABS-9-MK
ОABS-15-S
ОABS-15-M
ОABS-15-MK
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 wave- length)
5%
10-12%
Transmission
>92%
>90%
>85%
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 wavelenghts are 515, 800, 1030 nm;
** - order of thin-film polarizers for wavelengths of 250-800 nm is possible on request;
*** - depends on central wavelength.
商品属性 [波长] 800-1100 nm [动态衰减范围] >102 [输入脉冲持续时间] <50 fs