公开(公告)号：US20230408406A1

公开(公告)日：2023-12-21

申请号：US18338020

申请日：2023-06-20

Applicant: California Institute of Technology

Inventor： Mathieu Fradet ,  Ryan M. Briggs ,  Kazi M. Islam

IPC: G01N21/39 ,  H01S5/026 ,  H01S5/34 ,  H01S5/12 ,  H01S5/343

CPC classification number: G01N21/39 ,  H01S5/0268 ,  H01S5/3401 ,  H01S5/1203 ,  H01S5/34346 ,  H01S5/34313 ,  G01N2021/396 ,  G01N2021/393

Abstract: Disclosed herein is a spectroscopy device incorporating a mid-infrared laser. In one particular embodiment a spectroscopy device is provided including: a substrate; a single mode laser positioned on the substrate; a single mode detector positioned opposite to the single mode laser on the substrate. A gap is formed between the single mode laser and the single mode detector and a substance is positioned in the gap. The single mode laser is configured to output a tunable narrow wavelength of radiation towards the detector and when the single mode laser outputs a wavelength of radiation overlapping one of the substance's rotational-vibrational energy levels, the substance at least partially absorbs the radiation. The single mode detector is configured to measure the amount of narrow wavelength radiation that is not absorbed by the substance between the single mode detector and the single mode laser.

公开(公告)号：US11456573B2

公开(公告)日：2022-09-27

申请号：US17061020

申请日：2020-10-01

Applicant: California Institute of Technology

Inventor： Ryan M. Briggs ,  Clifford F. Frez ,  Mathieu Fradet

IPC: H01S3/08 ,  H01S5/12 ,  H01S5/343 ,  H01S5/10

Abstract: Single-mode distributed-feedback (DFB) lasers including single mode DFB waveguides with tapered grating structures are provided herein. Tapered grating structures provide for single mode DFB waveguides with predictable single mode operation. Uniform grating structures may provide for single mode operation, however DFB waveguides implementing uniform grating structures may operate at one of two single modes. Advantageously, DFB waveguides with tapered gratings operate with a spectrally narrow single mode at the same predictable single mode for all DFB waveguides with substantially identical specifications. Such predictability may lead to increased yield during manufacture of DFB waveguides with tapered gratings.

公开(公告)号：US20210104869A1

公开(公告)日：2021-04-08

申请号：US17061020

申请日：2020-10-01

Applicant: California Institute of Technology

Inventor： Ryan M Briggs ,  Clifford F. Frez ,  Mathieu Fradet

IPC: H01S5/12 ,  H01S5/10 ,  H01S5/343

Abstract: Single-mode distributed-feedback (DFB) lasers including single mode DFB waveguides with tapered grating structures are provided herein. Tapered grating structures provide for single mode DFB waveguides with predictable single mode operation. Uniform grating structures may provide for single mode operation, however DFB waveguides implementing uniform grating structures may operate at one of two single modes. Advantageously, DFB waveguides with tapered gratings operate with a spectrally narrow single mode at the same predictable single mode for all DFB waveguides with substantially identical specifications. Such predictability may lead to increased yield during manufacture of DFB waveguides with tapered gratings.