U-Shaped Tunable Laser Amplifier Layout for Higher Output
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Solution Overview
Problem
Existing wavelength variable lasers do not incorporate an additional optical amplification waveguide to enhance or adjust optical output intensity, limiting their performance.
Innovation Solution
A wavelength variable laser configuration that includes a semiconductor optical amplification element with a U-shaped first optical amplification waveguide, connected to two optical waveguide elements and a 2×2 branching unit, which couples an optical amplification waveguide to amplify laser beams efficiently without excessive loss, using a reflection-type wavelength variable filter and a second optical amplification waveguide on the same semiconductor chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an additional optical amplification waveguide is added to enhance optical output intensity, then the optical output intensity is improved, but the device complexity increases
Solution Approach 1:
The first optical amplification waveguide is arranged in a U-shape configuration where both ends are positioned on the same element end surface of the semiconductor chip. This nesting approach allows the waveguide to be folded back on itself, effectively integrating the amplification path within a compact footprint while maintaining the enhanced optical output intensity without proportionally increasing device complexity
Solution Approach 2:
By utilizing the element end surface as a two-dimensional platform and positioning both ends of the U-shaped waveguide on this surface, the design transitions from a linear one-dimensional layout to a two-dimensional spatial arrangement. This dimensional change enables efficient coupling with external optical components while keeping the overall device structure compact and manageable
2Productivity
If both ends of the optical amplification waveguide are on the same element end surface, then the coupling efficiency is improved, but the waveguide length increases
Solution Approach 1:
The optical amplification waveguide is configured in a U-shape (curved) geometry rather than a straight line. This curvature allows the waveguide to return to the same element end surface, enabling efficient coupling with external optical components while accommodating the necessary waveguide length within a compact spatial footprint, thus resolving the contradiction between coupling efficiency and waveguide length
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 configuration enhances the optical output intensity of the wavelength variable laser, allowing for adjustable and efficient amplification of laser beams, reducing the size of the laser device while minimizing optical loss.
Implementation Method 1
a semiconductor optical amplification element being arranged in such a way that both ends of a first optical amplification waveguide configured to amplify light by using a semiconductor
Implementation Method 2
two optical waveguide elements being connected to both ends of the first optical amplification waveguide
Data Source
AI summary
Provided is a wavelength variable laser including: a semiconductor optical amplification element being arranged in such a way that both ends of a first optical amplification waveguide configured to amplify light by using a semiconductor are on the same element end surface being an anti-reflection termination surface; two optical waveguide elements being connected to both ends of the first optical amplification waveguide on the element end surface; and a first 2×2 branching unit, wherein the two optical waveguide elements are connected to two ports on one side of the first 2×2 branching unit.