With the developments of the tunable laser source (TLS), there are increasing demands for
high-resolution dynamic wavelength calibration in recent years. Considering mutual …

Optical spectral analysis is essential to demonstrate the light-matter interactions from the
frequency domain. Although the existing coherent spectrum analyzers (COSA) have already …

In fiber-optic sensing, long-distance transmission and demodulation of weak signal light (SL)
are critical. This study improves the system by relocating an external cavity tunable laser …

Coherent spectroscopy provides a high optical frequency resolution; however, as the
measurement speed increases, the number of cycles in the chirped signal generated by the …

Optical measurements are closely related to the optical signal-to-noise ratio (OSNR) of the
laser, which can be improved using a tunable optical filter (TOF) to suppress frequency …