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 …

Linewidth is the most important parameter for characterizing the coherence properties of a
single-frequency laser, but unfortunately only the natural linewidth representing the …

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 …

This letter presents narrow-linewidth 780-nm edge-emitting semiconductor DFB lasers
fabricated without re-growth using UV-nanoimprinted surface gratings. The third-order …

This paper presents a novel method for high-precision narrow laser linewidth measurement
through demodulating the coherent envelope of the short delayed self-heterodyne …

We propose a precision measurement method of laser linewidth based on short-delay self-
homodyne, using the second peak-valley difference (SPVD) feature of the coherent power …

Multiple phase-shifted fiber Bragg gratings (MPS-FBGs) are proposed for a novel intensity-
type vibration sensing scheme with broadband source based interrogation. In this scheme …