Dual-Carrier Optical Device Wavelength Stability Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DWDM systems face challenges in maintaining wavelength stability due to temperature and current influences, which affect the modulation rate and bandwidth requirements, especially in high-speed communication networks.
Innovation Solution
A dual-carrier integrated optical device with independent carrier assemblies, including a DWDM active chip, heat sink, control element, and wavelength locker, which adjusts the temperature of the chip to stabilize the output wavelength, using a ceramic substrate and optical windows for precise wavelength control and feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple DWDM active chips with different wavelengths are coupled to increase communication bandwidth, then the communication bandwidth is improved, but the wavelength stability deteriorates due to temperature and current influences causing wavelength offset
Solution Approach 1:
The patent divides the single chip system into multiple independent DWDM active chips (first and second DWDM active chips), each with independent wavelength control. This segmentation allows each chip to be controlled independently to maintain wavelength stability while collectively providing increased communication bandwidth through wavelength division multiplexing.
Solution Approach 2:
The patent implements feedback control by monitoring the output wavelength of each DWDM active chip and adjusting its working current accordingly. The control unit receives wavelength information from each chip and dynamically adjusts the driving current to compensate for temperature drift and maintain stable central wavelengths, resolving the wavelength stability issue while enabling multi-chip operation for increased bandwidth.
2Productivity
If the modulation rate of a single DWDM active chip is increased to meet bandwidth demand, then the communication capacity is improved, but the wavelength offset phenomenon worsens due to current and voltage influences
Solution Approach 1:
The control unit implements real-time feedback control by monitoring the output wavelength of the DWDM active chip and dynamically adjusting its working current. This feedback mechanism compensates for wavelength drift caused by high modulation rates and current variations, maintaining wavelength stability even at increased modulation rates and enabling higher communication capacity.
Solution Approach 2:
The patent dynamically changes the working current parameter of the DWDM active chip based on real-time wavelength monitoring. By adjusting the current parameter in response to wavelength deviations, the system maintains stable central wavelength while operating at high modulation rates, thereby increasing communication capacity without sacrificing wavelength stability.
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
This solution enhances wavelength stability and transmission capacity by independently controlling each active chip's temperature, improving the internal structure and modulation mode to achieve stable laser output and increased bandwidth.
Implementation Method 1
the first heat sink is arranged on the independent control element; the independent control element is used to adjust temperature of the DWDM active chip to adjust an output wavelength of the DWDM active chip
Implementation Method 2
the first heat sink is also provided with a collimating lens which is used to collimate laser output by the DWDM active chip
Implementation Method 3
the wavelength locker divides received laser signals into two paths of optical signals, and obtains a direction and a size of wavelength drift of the DWDM active chip through a ratio of the two paths of optical signals
Data Source
AI summary
Disclosed are a dual-carrier integrated optical device and a photoelectric module. The optical device comprises: an encapsulation unit, and a ceramic substrate and two independent carrier assemblies arranged in the encapsulation unit. Every carrier assembly comprises a DWDM active chip arranged on the first heat sink, a first heat sink arranged on the independent control element, and an independent control element for adjusting the temperature of the DWDM active chip to adjust an output wavelength of the DWDM active chip. The DWDM active chip and the independent control element are respectively connected to the ceramic substrate. According to the characteristic that the wavelength of the active chip will shift with the temperature, an output laser wavelength of each active chip is independently controlled by means of the independent control element, which achieves higher wavelength stability and can realize optical signal transmission at different rates.