OA. Optical Attenuators
| 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 wavelength) | 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 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. |
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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.
Related products
| Spectral range | 190-1100 nm |
| Spectral resolution | up to 0.017 nm |
| Dynamic range | 1000:1 |
| Focal length | 150 mm |
| Wavelength | 400-1250 nm |
| Clear aperture | up to 20 mm |
| Peak isolation | up to 60 dB |
| Transmission | up to 92% |
| Damage threshold | up to 5 J/cm^2 |
| Input wavelength range | 780-1600 nm |
| SH output wavelength | 390-800 nm |
| TH output wavelength | 260-533 nm |
| FH output wavelength | 195-400 nm |
| Conversion efficiency | SH: 30-60%; TH: 5-10%; FH: 1-10% |
| Possible operating wavelength range | 200...2700 nm |
| Max. output rep. rate | up to 1 MHz |
| Rise time | down to 700 ps |
| Clear aperture | up to 20 mm |
| Contrast ratio | >1500:1 |
| Possible wavelength range | 700-1600 nm |
| GVD range at 800 nm | from -13800 to +16500 fs^2 |
| Transmission | >90% |
| Input beam diameter | up to 4 mm |
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