Abstract
A 3–5 μm mid-infrared band is a good window for atmospheric transmission. It has the advantages of high contrast and strong penetration under high humidity conditions. Therefore, it has important applications in the fields of laser medicine, laser radar, environmental monitoring, remote sensing, molecular spectroscopy, industrial processing, space communication and photoelectric confrontation. In this paper, the application background of mid-infrared laser is summarized. The ways to realize mid-infrared laser output are described by optical parametric oscillation, mid-infrared solid-state laser doped with different active ions and fiber laser doped with different rare earth ions. The advantages and disadvantages of various mid-infrared lasers are briefly described. The technical approaches, schemes and research status of mid-infrared lasers are introduced.
Highlights
Laser has been an important invention in the history of human science since the20th century, following atomic energy, semiconductors and computers, known as “the fastest knife”, “the most accurate ruler” and “the brightest light”
As shown in the table, in view of the characteristics of the simple structure, small size, easy application and so on, this paper focuses on the introduction on the research of shown in the table, in view of the characteristics of the simple structure, small an opticalAs parametric oscillator, excessive metal doped solid-state lasers and a fiber laser size, easy application and so on, this paper focuses on the introduction on the research of whose gain medium is soft glass
The optical parametric oscillators of lithium niobate crystals can be divided into pure lithium niobate (LiNiO3 ), periodically poled lithium niobate (PPLN) and periodically polarized lithium niobate doped with MgO (MgO-doped PPLN) optical parametric oscillators based on different crystals
Summary
20th century, following atomic energy, semiconductors and computers, known as “the fastest knife”, “the most accurate ruler” and “the brightest light”. After 60 years of research and development, laser-related technologies, products and services have spread all over the world, forming a rich and huge laser industry. It is widely used in material processing, communication, optical storage, medical and beauty technologies, research and military developments, instruments and sensors, entertainment display, additive manufacturing and other areas of the national economy. The technical ways to realize the mid-infrared laser output at a 3–5 μm band mainly include indirect conversion and direct generation. KTP, KTA, ZnGeP2, AgGaSe2, efficiency and excellent beam quality should conversion
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