Optical Fiber Module Heat Dissipation via Scattering Member
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Solution Overview
Problem
Conventional optical fiber modules face issues with leakage light conversion into heat, leading to potential adhesive ignition or damage due to increased heat generation from higher power optical fiber laser modules, and existing solutions either confine heat within the module or scatter light inwardly, causing temperature increases near the laser coupling portion.
Innovation Solution
An optical fiber module design featuring a package housing with a light scattering member that scatters leakage light into the internal space, where it is absorbed and converted into heat, and a heat dissipation portion that transfers this heat to the base plate for external dissipation, reducing the risk of adhesive damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If leakage light is converted into heat within the fiber holder, then the heat dissipation path is shortened and heat dissipation efficiency is improved, but the temperature increases beyond the heat resistance temperature of the adhesive, causing the adhesive to be ignited or damaged
Solution Approach 1:
The patent divides the light scattering function and heat dissipation function into separate components: a light scattering member that scatters leakage light away from the fiber holder, and a heat dissipation member that separately manages heat. This segmentation prevents heat concentration in the fiber holder, avoiding adhesive damage while maintaining effective heat management.
Solution Approach 2:
The light scattering member acts as an intermediary that redirects leakage light before it can be converted into heat within the fiber holder. By scattering the light in a different direction, the patent prevents direct energy conversion in the adhesive region, thereby protecting the adhesive from thermal damage.
2Loss of energy
If a light scattering member is used to scatter leakage light into the housing interior, then the power of light converted into heat near the laser coupling portion is reduced, but most scattered light is directed to the fiber holder and converted into heat within it, causing the same temperature increase problem
Solution Approach 1:
The patent separates the light scattering function from the heat dissipation function by using distinct members. The light scattering member redirects leakage light, while the heat dissipation member independently manages thermal energy. This prevents the concentration of both light energy conversion and heat accumulation in the fiber holder region.
Solution Approach 2:
The patent extracts the heat dissipation function from the fiber holder structure by introducing a separate heat dissipation member. This extraction allows the fiber holder to focus on its primary function of holding the optical fiber, while the dedicated heat dissipation member manages thermal energy away from the adhesive region.
3Use of energy by stationary object
If the bottom of the fiber holder is located on the same plane as the base plate to enable direct contact with the heat sink, then the heat dissipation efficiency is improved, but most leakage light is confined in the fiber holder and converted into heat therein, exceeding the adhesive heat resistance temperature
Solution Approach 1:
The patent segments the heat management system into separate functional zones: the light scattering member handles leakage light redirection, and the heat dissipation member independently manages thermal energy. This segmentation prevents heat concentration in the fiber holder even when the bottom is in contact with the heat sink.
Solution Approach 2:
The light scattering member serves as an intermediary that prevents leakage light from being confined in the fiber holder. By scattering the light in a different direction before it enters the fiber holder, the patent prevents the conversion of light energy into heat within the adhesive region, thereby protecting the adhesive from thermal damage.
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
Effectively converts leakage light into heat and dissipates it externally, preventing adhesive ignition and maintaining lower heat density within the module, thus ensuring safe operation even with high-power laser modules.
Implementation Method 1
a light scattering member that scatters light having a wavelength of the laser beam
Implementation Method 2
where it is absorbed and converted into heat
Implementation Method 3
a heat dissipation portion that transfers this heat to the base plate for external dissipation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The optical fiber module 1 has a package housing 10 having an internal space S defined by a base plate 11, a side wall 12, and a cover member 13, a laser device 32 disposed on the base plate 11 within the internal space S, an optical fiber 40 that transmits a laser beam emitted from the laser device 32 to an outside of the package housing 10, a light scattering member 50 that scatters light having a wavelength of the laser beam and covers an outer circumferential surface of the projecting end of the optical fiber 40, and a heat dissipation portion 80 disposed on the base plate 11. The optical fiber 40 has a projecting end that projects from an inner surface 12B of the side wall 12 toward the internal space S. The heat dissipation portion 80 covers a portion of an outer circumferential surface of the light scattering member 50 and exposes another portion of the outer circumferential surface of the light scattering member 50 to the internal space S. Leakage light generated within an optical fiber can effectively be converted into heat, which can be dissipated into an outside of the optical fiber module, and an adhesive used in a member for supporting the optical fiber or the like can be prevented from being ignited or damaged by fire.