Solid Cladding Glass for Suppressing Parasitic Sapphire Laser Light
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Solution Overview
Problem
Doped sapphire lasers face inefficiencies due to parasitic laser activities, where unwanted light is amplified and reflected back into the crystal, reducing efficiency and requiring ineffective liquid cladding solutions that are hazardous and prone to decomposition.
Innovation Solution
A solid cladding glass with a refractive index matched to doped sapphire is applied to the surface, absorbing parasitic light and minimizing reflections, using components like SiO2, Al2O3, and absorption components like NiO to achieve high absorption and low internal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If liquid cladding material is used to suppress parasitic light, then parasitic laser activity is reduced, but the system becomes hazardous and prone to decomposition
Solution Approach 1:
The patent changes the physical state parameter of the cladding material from liquid to solid, and adjusts the refractive index parameter to match sapphire (n ≥ 1.70). This resolves the contradiction by providing a stable solid material that suppresses parasitic light through refractive index matching while avoiding the decomposition issues of liquid materials.
Solution Approach 2:
The patent uses a composite glass material containing specific components (PbO, TiO2, La2O3, Nb2O5, and absorption components like NiO, CoO, Fe2O3) to achieve both high refractive index and light absorption properties. This composite approach allows the solid cladding to effectively suppress parasitic laser activity while maintaining long-term stability.
2Loss of energy
If liquid cladding is used to reduce parasitic oscillations, then energy loss is reduced, but the cladding requires frequent replacement and maintenance
Solution Approach 1:
By changing the cladding material from liquid to solid state and optimizing its refractive index (n ≥ 1.70) and absorption properties, the patent creates a maintenance-free solution that permanently reduces parasitic oscillations without requiring frequent replacement.
3Object-affected harmful factors
If the refractive index of cladding glass is increased to match sapphire, then reflections are minimized, but manufacturing complexity increases
Solution Approach 1:
The patent employs a well-established composite glass system (lead silicate glass) with proven manufacturing processes. By using conventional glass components that can be precisely controlled during production, the high refractive index is achieved without excessive manufacturing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses parasitic laser light, enhancing the efficiency of doped sapphire lasers by reducing unwanted reflections and maintaining stability over time without the hazards of liquid cladding materials.
Implementation Method 1
absorption components like NiO to achieve high absorption and low internal transmission
Implementation Method 2
A solid cladding glass with a refractive index matched to doped sapphire is applied to the surface, absorbing parasitic light and minimizing reflections
Data Source
AI summary
The present disclosure relates to a glass having a refractive index of at least 1.7 as well as the use of the glass as a cladding glass of a solid-state laser. The disclosure also relates to a laser component comprising a core of doped sapphire and a cladding glass being placed on said core. The cladding glass is arranged on said core such that light exiting from the core due to parasitic laser activity can enter the cladding glass and can be absorbed there. Thus, a laser component with improved efficiency is obtained. The present disclosure also relates to a method for producing the laser component.