PATENT CLAIM ANALYSIS

Application Number: 15922123
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["385", "001000"]

Abstract:
Embodiments of the invention describe systems, apparatuses and methods for providing athermicity and a tunable spectral response for optical filters. Finite impulse response (FIR) filters are commonly implemented in photonic integrated circuits (PICs) to make devices such as wavelength division multiplexing (WDM) devices, asymmetric Mach-Zehnder interferometers (AMZIs) and array waveguide gratings (AWGs). Athermicity of an FIR filter describes maintaining a consistent frequency transmission spectrum as the ambient temperature changes. A tunable spectral response for an FIR filter describes changing the spectrum of an FIR filter based on its application, as well as potentially correcting for fabrication deviations from the design. In addition, embodiments of the invention reduce energy dissipation requirements and control complexity compared to prior art solutions.

Claim (Index 17):
A temperature-stabilized optical filter, comprising:\n a first waveguide including a first waveguide section and a second waveguide section, the first waveguide section having a first length and a first temperature coefficient of refractive index, the second waveguide section having a second length and a second temperature coefficient of refractive index greater than the first temperature coefficient of refractive index; a second waveguide including a third waveguide section and a fourth waveguide section, the third waveguide section having a third length and a third temperature coefficient of refractive index, the fourth waveguide section having a fourth length and a fourth temperature coefficient of refractive index greater than the third temperature coefficient of refractive index, wherein a product of the first length and the first temperature coefficient of refractive index added to a product of the second length and the second temperature coefficient of refractive index equals a product of the third length and the third temperature coefficient of refractive index added to a product of the fourth length and the fourth temperature coefficient of refractive index; an input coupler to split incident light into the first and second waveguides; an output coupler to interfere light from the first and second waveguides to produce interfered light; a heater to heat at leak a portion of the second and fourth waveguide sections; and a temperature controller to control the heater to heat the portion of the second and fourth waveguide sections to a fixed temperature and thereby stabilize a frequency spectrum of the interfered light.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 90.0
- Lexical Diversity: 1.55682
- Patent Class: 385.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13751492', '15612364', '14929603', '14537575', '15853422']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8000663813189981
- 35 USC 102 Novelty (BERT): 0.4998971916064502
- Combined Prediction Score: 0.7700494623477433
- Mean Citation Score: 246.07698800000003
- Max Citation Score: 311.4513
- Similarity Product: 246.9421882940769

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test