Practical saturable absorption device based on black phosphorus

A saturable absorption and black phosphorus technology, applied in the field of practical saturable absorption devices, can solve the problems of precise control of inhomogeneous hand-shaped optical properties, low light absorption of single-layer graphene, and difficulty in dispersing

Inactive Publication Date: 2015-03-25
鲍小志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when making SWCNT saturable absorbers, it is difficult to disperse due to its easy clustering; and its inhomogeneous chiral properties have inherent problems in the precise control of the optical properties of saturable absorbers, and limit the bandwidth of saturable absorption.
When using graphene as a saturable absorber, although it has broadband saturable absorption characteristics

Method used

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  • Practical saturable absorption device based on black phosphorus
  • Practical saturable absorption device based on black phosphorus
  • Practical saturable absorption device based on black phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The black phosphorus nanosheet layer obtained by mechanical exfoliation is used as a saturable absorbing layer, and the saturable absorbing layer is covered with a layer of matrix film material as a functional layer, such as polyvinyl alcohol (PVA), polycarbonate (PC) , polystyrene (PS), polymethyl methacrylate (PMMA), organic dyes, inorganic materials, metal oxides, fluorides, calcium compounds, graphene, etc., forming a transmission system composed of a saturable absorbing layer and a functional layer type saturable absorption devices, such as figure 1 shown. Alternatively, a direct transmissive saturable absorber device can be formed by mixing black phosphorus with other materials.

Embodiment 2

[0044] Choose one of metal, glass or silicon or silicon dioxide or silicon carbide or quartz or sapphire or gallium arsenide, aluminum arsenide or calcium fluoride or selenide or oxide dielectric material as the substrate, and arrange metal high reflection on the substrate Layer or medium high reflection layer or metal and medium heterogeneous high reflection layer, arrange black phosphorus film or black phosphorus nanosheet layer or black phosphorus derivative or black phosphorus and graphene, graphene derivative (graphene) on the high reflection layer , graphyne, etc.), BN, transition metal sulfides (MoS 2 、WS 2 、WSe 2 etc.), topological insulator materials (Bi 2 Se 3 , Bi 2 Te 3 or Sb 2 Te 3 etc.) and other two-dimensional layered materials to form a heterostructure layer as a saturable absorbing layer, and arrange a matrix film material similar to that in Example 1 on the saturable absorbing layer as a functional layer or a protective functional layer, thus forming...

Embodiment 3

[0046] Select a material with low reflectivity and high light transmittance as the base layer, arrange a high-reflection layer, a saturable absorbing layer, and a functional layer with a relatively low reflectance on the base layer in sequence, and arrange an anti-reflection function on the other end of the base layer layer or anti-reflection functional layer, thus forming the outcoupling saturable absorbing device of this patent, such as image 3 shown. Example 3 is actually a scheme in which functional intercalation is added to the four-layer structure. The schemes of adding functional intercalation in other layers will not be listed one by one.

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Abstract

The invention relates to a practical saturable absorption device based on black phosphorus and belongs to the field of saturable absorption devices of laser devices. The practical saturable absorption device based on the black phosphorus is formed by combining four layers of materials or mutual combining three layers of the four layers of materials or combining the four layers of materials combined mutually and functional insertion layers added on the upper portion and the lower portion of the four layers of materials at will or combining the saturable absorption layers and any one layer of materials or combining the saturable absorption layers, and each saturable absorption layer comprises at least one of a black phosphorus film, black phosphorus nano lamella particles, black phosphorus ramifications and functionalization black phosphorus. According to the practical saturable absorption device based on the black phosphorus, the application of Q regulation and mode locking of the laser device, optical signal processing and the like is achieved, and more importantly, the effect that the modulation depth can be flexibly regulated by giving play to the property of the black phosphorus is achieved.

Description

technical field [0001] The invention relates to a practical saturable absorption device based on black phosphorus, which belongs to the field of saturable absorption devices of lasers. [0002] Background technique [0003] The main saturable absorber device used in the market today is the semiconductor saturable absorber mirror (SESAM). However, semiconductor saturable absorber mirrors have many disadvantages that are difficult to overcome. First, SESAM requires a complex and expensive clean room-based manufacturing system with complex manufacturing processes and high costs; second, due to the inherent bandgap of III-IV semiconductors, the saturated absorption spectrum is narrow and basically limited to the near-infrared band. 1. In the far-infrared band, there is currently no SESAM available; third, the optical damage threshold of SESAM is also very low, making it difficult to apply in the field of high-power lasers. [0004] In recent years, graphene has been found to ...

Claims

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Application Information

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IPC IPC(8): H01S3/098H01S3/11H01S5/065H01S5/068
Inventor 鲍小志
Owner 鲍小志
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