Device for measuring dynamic change in wavelength of optical signal has angularly dispersive optical element, position-resolving light receiver with photodiode(s) in difference circuit

摘要

The device has an angularly dispersive optical element (8) followed by a first position-resolving light receiver (10) with at least one photodiode arrangement operated as a difference circuit. The first position-resolving light receiver contains at least one differential photodiode or at least one lateral effect photodiode. AN Independent claim is also included for a method of operating an inventive device.