The OFE-DSP is a fiber pigtailed compact optical absolute frequency
encoder that can measure the optical frequency of tunable lasers or
other light sources as a function of time, as well as the optical power as a
function of frequency. This device combines a patent pending optical
frequency encoder head with analog and DSP circuits to obtain the
instantaneous optical frequency of a light source in real time, with a
frequency resolution down to a few MHz. The device is ideal for
applications involving tunable or swept-frequency lasers, where it can act
as a k-clock for the fast Fourier transforms (FFT) of received signals,
which is necessary to obtain precise distance or depth information in
applications such as coherence LIDAR for autonomous vehicles, OFDR
based distributed measurement and sensing, and optical coherence
tomography (OCT). The device can also be used as an interrogator for
fiber Bragg grating (FBG) based sensor systems to obtain temperature,
strain, or acoustic information. Another important application is for
precise laser frequency control, such as linearizing the rate of laser
frequency tuning or simply stabilizing the laser frequency. ChirpRiteTM, a
breakthrough in dynamic optical frequency monitoring and analysis.