Publications by authors named "ZhongAn Zhao"
Mode-Locked Characteristic of L-Band All-Fiber Laser with Different 2D and Quasi-2D Perovskite Saturable Absorbers.
ACS Appl Mater Interfaces
November 2024
Article Synopsis
- Recent advancements in quasi-2D perovskites, particularly ((PEA)(CsPbBr3)PbBr), have highlighted their exceptional optoelectronic properties and environmental resilience, creating diverse application possibilities.
- Structural differences in these materials, caused by varying values of "", lead to unique nonlinear behaviors that have not been fully explored yet.
- Comparative studies reveal that the = 5 quasi-2D perovskite showcases superior saturable absorption and optimal performance in laser applications, making it promising for ultrafast optics due to its favorable characteristics.
Delayed self-heterodyne interferometry is a commonly used technique for the measurement of laser linewidth. It typically requires the use of a very long delay fiber when measuring narrow linewidth (especially linewidths in the kHz-range) lasers. The use of long fibers can result in system losses and the introduction of 1/f noise that causes spectral line broadening.
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- - Stimulated Brillouin scattering (SBS) is a promising technology for creating low-noise, narrow-linewidth lasers, especially through unguided Brillouin lasers (BLs) which offer better scalability and flexibility than guided-wave setups.
- - The research introduces a diamond Brillouin laser (DBL) operating at 1064 nm, achieving a notable output power of 22.5 W and a narrow linewidth of 46.9 kHz.
- - Key advancements include a significant reduction of background noise from the pump, enhanced by 35 dB, marking progress towards powerful Brillouin oscillators with both high output and fine linewidths.
Delayed self-heterodyne/homodyne measurements based on an unbalanced interferometer are the most used methods for measuring the linewidth of narrow-linewidth lasers. They typically require the service of a delay of six times (or greater) than the laser coherence time to guarantee the Lorentzian characteristics of the beat notes. Otherwise, the beat notes are displayed as a coherent envelope.
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