We demonstrate a 446.5 nm GaN semiconductor laser with sub-MHz linewidth. The linewidth reduction is achieved by locking the laser to a magnesium fluoride whispering gallery mode resonator characterized with 10(9) quality factor. Self-injection locking ensures single longitudinal mode operation of the...
This paper explores the impact of gain medium on linewidth narrowing in integrated self-injection locked III–V/SiN lasers, theoretically and experimentally. We focus on the effects of carrier densities of states in zero- and two-dimensional structures due to quantum-dot and quantum-well ...
The 3-dB linewidth of the DFB laser is compressed from 320 kHz to 1.5 kHz, which is narrowed by 2 orders of magnitude. Based on dual narrow linewidth lasers locked to the same micro-resonator, an all-optical high-performance photonic microwave signal is generated by using the optical ...
摘要: We present the analysis of the self-injection locking of a single-frequency laser diode to a high-Q whispering gallery mode (WGM) microresonator with Rayleigh backscattering. Simple analytical formulas for the width of the locking band and resulting laser linewidth are derived....
We reported an integrated all-fiber 350Hz linewidth distributed feedback (DFB) fiber laser assisted by self- injection locking;Theoretically and experimentally verified the apodized π phase-shifted fiber Bragg grating (π-FBG) could achieve much better single longitudinal mode operation;We have encapsu...
Frequency microcombs, alternative to mode-locked laser and fiber combs, enable miniature rulers of light for applications including precision metrology, molecular fingerprinting and exoplanet discoveries. To enable frequency ruling functions, microcombs must be stabilized by locking their carrier-envelope offs...
self-injection lockingwhispering gallery modeA method for narrowing the linewidth of a DFB laser diode by self-injection locking it to a packaged spherical whispering-gallery-mode (WGM) resonator in add-drop configuration is proposed and experimentally demonstrated. The WGM resonator in add-drop ...
Considering that the optical feedback scheme using the high-reflection Al film for the amplifier is also a part of the DBR oscillators, we define such an amplifier as a self-injection-locked laser amplifier device. Thus, the amplification process also has a pump threshold, which is apparently ...
This paper introduces an innovative continuous-wave (CW) radar technology, called the self-injection-locked (SIL) radar. It can compete with pulse radar technology in resisting clutter and interference, but maintains the advantage of low complexity that is associated with the CW radar. Accordingly,...
We report on experimental demonstration of a low-cost sub-kilohertz Brillouin fiber ring laser pumped from an actively stabilized self-injection locked distributed feedback (DFB) laser diode. Locking of the commercial DFB laser to a ~11-m-length high-Q-factor fiber-optic ring cavity leads to ...