A narrow-linewidth laser with excellent temporal coherence is an important light source for
microphysics, space detection, and high-precision measurement. An ultranarrow-linewidth …

Laser linewidth narrowing down to kHz or even Hz is an important topic in areas like clock
synchronization technology, laser radars, quantum optics, and high-precision detection …

We present an amplitude difference comparison of coherent envelope method for accurately
measuring the laser linewidth. The new method of comparing the contrast difference of the …

We present a numerical calculation with iterative algorithm method for accurately measuring
laser linewidth. In this new method, the self-heterodyne spectrum of long delay fiber is …

Narrow-linewidth lasers mainly depend on the development of advanced laser linewidth
measurement methods for related technological progress as key devices in satellite laser …

The delayed self-heterodyne interferometer (DSHI) is a simple and effective method of
measuring the laser linewidth. However, conventional DSHIs generally cannot measure a …

We study the stability of period-one (P1) oscillations experimentally generated by
semiconductor lasers subject to optical injection (OI) and by those subject to optical …

A new scheme of heterodyning facilitated by electro-optic modulator (EOM) is used to
characterize the Allan deviation and phase noise of the beat note generated using different …

We propose a novel approach to laser frequency noise characterization by delayed self-
heterodyne. Compared with the traditional treatment, our method applies to both long and …

In this study, we report the development of a frequency standard for optical fiber
communication applications based on a two-photon transition in rubidium at 385.2 THz. This …