Optical Bench Heater Shape Optimization for Isothermal Control
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Solution Overview
Problem
Optical communications systems face challenges in maintaining an isothermal environment for opto-mechanical devices without using thermally conductive enclosures, which can result in increased size, cost, and temperature gradients, leading to inconsistent performance and reduced component lifespan.
Innovation Solution
An integrated heater is optimized using a multi-stage design optimization procedure, which involves identifying components, determining design criteria, and performing thermal computational fluid dynamics and finite element analysis to alter the initial heater configuration, ensuring a reduced temperature gradient and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally conductive enclosure is used to maintain isothermal environment, then temperature uniformity is improved, but device size and cost increase
Solution Approach 1:
The patent extracts the thermal management function from a separate thermally conductive enclosure and integrates it directly into the optical bench structure. The optical bench itself is designed with thermal management features, eliminating the need for an additional enclosing structure and reducing overall device size while maintaining temperature uniformity.
Solution Approach 2:
The patent merges the structural support function of the optical bench with the thermal management function. By combining these functions into a single integrated structure, the patent eliminates redundant components and reduces device size while achieving isothermal environment maintenance.
2Temperature
If heater power is increased to maintain temperature at lower ambient temperatures, then temperature stability is improved, but power consumption and failure risk increase
Solution Approach 1:
The patent implements localized heating zones on the optical bench rather than uniform heating. Different regions of the optical bench are equipped with heating elements tailored to the specific thermal requirements of components in those regions, allowing precise temperature control with lower overall power consumption.
Solution Approach 2:
The patent uses variable power delivery to heating elements based on ambient temperature conditions and real-time temperature sensor feedback. The system dynamically adjusts heating power to maintain temperature stability while minimizing energy consumption, avoiding excessive power delivery that would increase failure risk.
3Temperature
If heater power is increased to maintain temperature at lower ambient temperatures, then temperature stability is improved, but reliability decreases
Solution Approach 1:
The patent implements a closed-loop feedback control system using temperature sensors distributed across the optical bench. These sensors continuously monitor temperature and provide feedback to a control system that adjusts heater power accordingly, maintaining temperature stability while preventing excessive power delivery that could cause component failure.
Solution Approach 2:
The patent incorporates thermal management design features during the manufacturing stage, including thermally conductive pathways and heat dissipation structures, to prevent temperature-related failures before they occur. This proactive approach reduces reliance on high-power heating during operation and improves overall system reliability.
4Ease of manufacture
If simple heater configuration is used, then manufacturing cost is reduced, but temperature gradient control deteriorates
Solution Approach 1:
The patent divides the heating system into multiple independent heating zones or elements integrated into the optical bench structure. Each zone can be independently controlled to address local thermal requirements, achieving effective temperature gradient control while using simple, manufacturable heating elements that can be produced with standard fabrication processes.
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 optimized integrated heater provides a consistent isothermal environment with reduced temperature gradients and power consumption, enhancing the performance and lifespan of opto-mechanical devices like wavelength selective switches without the need for thermally conductive enclosures.
Implementation Method 1
a heater may be integrated into an optical bench to provide heating for other components included in the optical bench
Implementation Method 2
The method may include determining a thermal computational fluid dynamics model for the optical device, calculating a set of coefficients for external surfaces of a package for the optical device
Data Source
AI summary
A method may include identifying, by a device, a set of components of an optical device. The method may include determining, by the device, a set of design criteria based on the set of components of the optical device. The method may include identifying, by the device, an initial heater configuration based on the set of design criteria. The method may include determining, by the device, a set of optimization parameters for determining a target heater configuration based on the set of design criteria. The method may include performing, by the device and based on the set of optimization parameters, an optimization procedure to alter the initial heater configuration to determine the target heater configuration. The method may include providing, by the device, information identifying the target heater configuration based on performing the optimization procedure.