Ultra-low Loss Hollow-core Waveguides
- Technology Benefits
- Ultra-low loss, Low propagation loss, High fabrication tolerance
- Technology Application
- On-chip optical communication, Compact optical delay line, Advanced optical filters, True-time delay for phased array antennas, Data packet traffic engineering Interferometric sensors.
- Detailed Technology Description
- None
- Supplementary Information
- Patent Number: US8442374B2
Application Number: US13109205A
Inventor: Chang-Hasnain, Connie | Zhou, Ye | Karagodsky, Vadim | Sedgwick, Forrest G. | Huang, Michael Chung-Yi
Priority Date: 25 Nov 2008
Priority Number: US8442374B2
Application Date: 17 May 2011
Publication Date: 14 May 2013
IPC Current: G02B000634 | G02B0006036 | G02B000610
US Class: 385129 | 385037 | 385131
Assignee Applicant: The Regents of the University of California
Title: Ultra-low loss hollow core waveguide using high-contrast gratings
Usefulness: Ultra-low loss hollow core waveguide using high-contrast gratings
Summary: Apparatus for guiding light propagated through high contrast grating-hollow waveguides (HCG-HW) for compact optical delay line, advanced optical filters, true time delay phased array antennas, data packet traffic engineering, interferometric sensors and on-chip optical communication.
Novelty: Apparatus for guiding light propagated through high contrast grating-hollow waveguides (HCG-HW), has core that receives incident light beam between gratings and provides lateral confinement in response to glancing reflections
- Industry
- Biomedical
- Sub Category
- Medical Implant
- Application No.
- 8442374
- Others
-
Tech ID/UC Case
18056/2009-057-0
Related Cases
2009-057-0
- *Abstract
-
The ability to generate long optical delays with low intrinsic loss is useful for a wide range of applications including optical signal processors, RF filtering, optical buffers, and optical sensing. Optical fibers have been used for these applications with advantages such as ultra-low loss, dispersion and nonlinearity and an exceedingly large bandwidth. However, they are bulky, heavy, and lack of manufacturing scalability.
Lithographically defined, chip-scale waveguides have been reported in SiO2/Si and III-V material systems. They are desirable because they are compact, light-weight, and can be integrated with other optoelectronic devices. The lowest reported loss achieved to-date in chip-based waveguides is on the order of 1 dB/m, three to four orders of magnitude higher than that of optical fibers. This loss is unacceptably high for most applications requiring 0.01 dB/m. The fundamental reasons for the high losses are direct band-edge absorption, free carrier absorption, and absorption due to interaction with optical phonons. In addition, these devices are expected to have high nonlinearity and dispersion.
To address these limitations, Researchers at UC Berkeley have invented a novel ultra-low loss hollow-core waveguide structure. The new structure provides unprecedented mirror reflectivity and fabrication tolerance. The design can achieve exceedingly low propagation loss that cannot be achieved by conventional waveguide concepts. In addition, the researchers show a potential 2D design with loss estimated to be less than 0.01 dB/m.
- *IP Issue Date
- May 14, 2013
- *Principal Investigator
-
Name: Connie Chang-Hasnain
Department:
Name: Michael ChungYi Huang
Department:
Name: Vadim Karagodsky
Department:
Name: Forrest Sedgwick
Department:
Name: Ye Zhou
Department:
- Country/Region
- USA
