Beat frequency monitoring systems
of a stabilised laser against an
NPL iodine stabilised laser

NPL beat frequency monitoring systems can be used for:

• Calibration of stabilised laser sources used in precision length metrology and spectroscopy
• Intercomparison and characterisation of iodine stabilised reference lasers
• Assessment of laser frequency stability of industrial stabilised lasers

The NPL hardware system comprises:

• Fully adjustable and demountable beam combining optics to cope with currently available Industrial stabilised lasers and stabilised laser interferometers
• Fast photodetection, RF amplification and low noise filtering with beat detection bandwidths up to 800 MHz
• 1 GHz frequency counter with IEEE interface
• 1 GHz RF spectrum analyser available on request
• Custom options available on request

NPL beat frequency software for PCs:

• Absolute frequency and drift measurement of stabilised lasers over several hours
• Beat frequency two sample (Allan variance) measurements

Contact

Customer Service tel: +44 20 8943 6796
E-mail: laser_enquiries@npl.co.uk