Mode Control for Octagonal Microcavity Lasers Zhang, Zhen-Ning; Li, Jian-Cheng; Hao, You-Zeng ...
2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings (ACP/POEM),
2023-Nov.-4
Conference Proceeding
A compact, controllable, and bistable deformed octagonal microcavity laser is experimentally demonstrated. A counterclockwise bistable hysteresis loop is observed with the continuous injection ...current from 15 to 32 mA at 288 K. And, the direct modulation bandwidth of the laser is increased from 12 GHz in the low state to 16 GHz in the high state through the photon-photon resonance (PPR) effect.
Hybrid-cavity of a Fabry-Pérot (FP) cavity and a microcavity with the microcavity as a wavelength selective reflector are reported for realizing single mode semiconductor lasers. Mode coupling ...between a microcavity mode and a FP mode results in mode Q factor enhancement and stable single mode operation. Furthermore, optical bistability are realized in the hybrid lasers as the unbiased microcavity working as a saturable absorption. Two bistability regions are realized for the hybrid lasers around threshold current and above threshold with mode competition, and all-optical flip-flop is demonstrated.
We have demonstrated circular-side square microcavity lasers with a center hole to control the lasing modes. Dual-transverse-mode lasing with wavelength intervals ranging from 1 to 4.4 nm is realized ...experimentally for the 16μm-side-length square microlasers.
All optical inverter is realized based on a hybrid square-rectangular laser. Dynamic performance up to 5 Gb/s is reached with extinction ratio of 10 dB.
Mode competition bistability is reported for a square-rectangular coupled cavity semiconductor laser. Single mode operations with a tuning range larger than 30 nm are realized for a coupled-cavity ...semiconductor laser with a deformed square microcavity.
Hybrid square/rhombus-rectangular lasers are proposed and demonstrated. Single mode operation with a continuous wavelength tunable range of 25nm is realized with side mode suppression ratio (SMSR) > ...30dB and the highest SMSR of 44dB.
We present a tunable hybrid square/rhomb-rectangular AlGaInAs/InP semiconductor laser for ethylene detection. Single-mode lasing around 1.626\ \mu \text{m} is achieved with a side mode suppression ...ratio above 30 dB and an output power over 1 mw.
Semiconductor lasers with optical feedback can produce plentiful non-linear dynamics, including periodic and chaotic oscillations, which are usually applied to microwave signals and physical random ...number generation, respectively. Chaotic semiconductor lasers are especially successful in generating random numbers compared with pseudorandom numbers generated by a computing process. We report a self-chaotic microlaser based on the internal mode interaction of nearly degenerate modes. A special resonator is designed and demonstrated with the two modes’ frequency intervals on the order of GHz. These modes with strong mode beating result in chaos, and physical random bits are obtained from the laser output power at 10 Gb/s. Our proposals provide a novel scheme to generate laser chaos for high-speed random number generation.
We experimentally demonstrate twin-microsquare and microsquare-Fabry-Pe´rot (FP) coupled-cavity semiconductor lasers. By adjusting the injection currents, dual-wavelength lasing with tunable ...frequency differences ranging from 42 to ~235 GHz and a wavelength tuning range of ~10 nm is respectively achieved for the twin-microsquare and microsquare-FP lasers.
The mechanical property and forming limit experiments were carried out on a higli manganese TRIP/TWIP steels with manganese of 18.8%. And the forming /imit diagram was obtained. This hig：h manganese ...steel shows outstanding mechanical properties comhining high strength with good formability. Its limit plane strain corresponding to the lowest point in the plain strain condition is about 38%. The effects of conventional mechanical property on the limit plane strain were analyzed. With increasing the content of Mn, the limit plane strain increases, indicating that TWlP effect is advantageous to the increase of formability. Combining with three classical models and volume invaria ble principle, a FLD model was buih, which is suitable for high manganese steels very well.
