Wavelength Conversion Package Stabilizing Alignment via Flexible Optical Transmitter
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Solution Overview
Problem
Conventional nonlinear optical devices face significant optical loss and alignment challenges due to temperature variations and photorefractive effects, leading to reduced power conversion efficiency and complex alignment processes.
Innovation Solution
A wavelength conversion device package is designed with a temperature regulating block and temperature sensor for the optical oscillator and wavelength modulator, utilizing a flexible optical transmitter to stabilize alignment and minimize optical loss, incorporating a flexible optical fiber and precise temperature control to maintain alignment under environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If two temperature stabilization modules are applied to the laser diode and the polarization-inverted waveguide respectively, then temperature stabilization is improved, but misalignment occurs according to respective temperature stabilization set values and thus optical connection power varies
Solution Approach 1:
The patent combines the temperature stabilization function into a single integrated module that simultaneously stabilizes both the laser diode and the polarization-inverted waveguide temperature, eliminating the misalignment issues caused by separate temperature control modules with different set values. This unified approach ensures consistent thermal conditions across all optical components, maintaining stable optical connection power.
2Power
If optical connection using lenses is adopted, then wavelength conversion is achieved, but alignment is complicated and interconnection loss is considerable
Solution Approach 1:
The patent extracts and eliminates the complex lens-based optical connection system from the wavelength conversion device. By removing the condenser lens and collimating lens components, the design simplifies the optical path while maintaining efficient wavelength conversion through direct optical coupling, thereby reducing alignment complexity and interconnection loss.
3Loss of energy
If Ti diffused waveguide is used, then waveguide mode control and minimum waveguide loss are achieved, but photorefractive effect causes material problems and limits output power
Solution Approach 1:
The patent applies local quality modification by creating a polarization-inverted waveguide structure with specific regional properties. The waveguide is designed with a core region having optimized refractive index and cladding regions with tailored characteristics to suppress the photorefractive effect while maintaining low waveguide loss and effective mode control in the critical optical interaction zone.
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 reduces optical loss and enhances power conversion efficiency by stabilizing alignment and temperature regulation, allowing for more compact and efficient packaging of nonlinear optical devices.
Implementation Method 1
providing a temperature regulating block and a temperature sensor to an optical oscillator and a wavelength modulator
Implementation Method 2
fixing a flexible optical transmitter to the optical oscillator and the wavelength modulator
Implementation Method 3
a second harmonic generation which is a special form of the frequency, is adopted. The second harmonic generation projects a pumping light source having the low frequency into a polarization-inverted nonlinear optical waveguide and converts to a light source having the double frequency
Implementation Method 4
The conventional Ti diffused waveguide features the waveguide mode control and the minimum waveguide loss
Data Source
AI summary
A nonlinear optical device is provided. More specifically, a wavelength conversion device package with less optical loss stabilizes optical alignment under an external environmental change, for example, in a temperature variation by providing a temperature regulating block and a temperature sensor to an optical oscillator and a wavelength modulator and fixing a flexible optical transmitter to the optical oscillator and the wavelength modulator.The wavelength conversion device package includes an optical oscillator comprising a light source for emitting a light; a flexible optical transmitter for transferring the light emitted from the optical oscillator to a wavelength modulator; and the wavelength modulator for receiving the light from the optical transmitter and radiating a wavelength-modulated light.