MgO-doped periodically poled lithium niobate (MgO:PPLN) optical parametric oscillators (OPOs) have the ability to generate high-power mid-infrared (MIR) laser with high efficiency. They have important applications in the fields of atmosphere monitoring, laser spectroscopy, photoelectric detection, and remote sensing surveys. In particular, miniaturized high-power MgO:PPLN OPOs are of paramount importance.
The dispersion turning point (DTP) in microfibers has proven to be an effective exceptional phenomenon for sensitivity improvement. In order to break the adiabaticity condition and excite higher-order modes effectively to satisfy the condition of DTP, the transition segments of tapered optical microfiber should be abrupt.
High resolution (HR) remote sensing images play an important role in environment monitoring, military reconnaissance, and urban planning. However, the direct acquisition of numerous HR images requires high-performance imaging equipment, while improving image resolution with super-resolution (SR) algorithm saves a lot in time and money. Therefore, it is of great significance to study on image SR algorithms.
Characterized by large aperture and long focal length, the reflective optical system has the advantages of small number of optical elements and simple optical structure. But the intrinsic aberration and the misalignment derived aberration increase exponentially with the increase of focal length and aperture, resulting in a significant degradation of the optical system imaging quality caused by just a small amount of misalignment, which brings great difficulty and cost to the realization of reflective optical instruments.
Micropolarizer array is the core component of division of focal plane polarimeter (DoFP). At present, the metal-wire-grid micropolarizer array has been commercialized in polarization cameras. Liquid crystal micropolarizer (LCMP) array can be designed to achieve a high extinction ratio and cover wider band. Therefore, it has great potential to develop a DoFP and achieve real-time polarization imaging.
Vertical Cavity Surface Emitting Laser (VCSEL) presents the basis for large data rate optical interconnects in data centers. Presently, VCSELs have replaced edge-emitting lasers for distances below 500 m due to their profound advantages, like on-wafer test possibility. The demand for VCSEL has significantly increased with the development of autonomous vehicles.
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