Measuring device for measuring change of intensity of sample pulse when medium passes through pulse during examining sample, has device arrangement and resonator arrangement meeting each other such that medium is irradiated by pulses

摘要

The device (10) has a detector arrangement (60) including a detector (61) e.g. photodiode, for detecting an intensity of a sample pulse (34) after a medium (42) passes through the sample pulse. The medium is arranged in an optical resonator arrangement (50) with a pair of mirrors (51, 52). The resonator arrangement is suitable for performing a cavity-ring-down-process. An arrangement of the device and the resonator arrangement meet each other such that the medium is irradiated by a pumping pulse (32) and the sample pulse for multiple times. The optical resonator arrangement is a passive resonator arrangement. An independent claim is also included for a method for measuring change of an intensity of a sample pulse when a medium passes through the sample pulse based on a time lag of the sample pulse from a pumping pulse.