Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Iakovelv, V. Syrbu, A. Rudra, A. Kapon, E. |
| Copyright Year | 2000 |
| Description | Author affiliation: Swiss Federal Inst. of Technol., Lausanne, Switzerland (Iakovelv, V.) |
| Abstract | Summary form given. We study long wavelength fused InGaAsP-AlGaAs air-gap VCSEL structures which are obtained in-situ by the localised wafer fusion technique. We have used InGaAsP/InP active cavity material and undoped AlGaAs/GaAs DBRs, all grown by MOCVD at 650/spl deg/C. InGaAsP/InP material is grown with a constant group V elements composition throughout the structure. It includes a strain compensated quantum well structure with 1% compressive strain in the wells and 0.8% tensile strain in the barriers. The peak of the photoluminescence spectrum is at 1550 nm. Air gap was formed by etching a 80 /spl mu/m diameter recess in the active material before fusion. Cavity mode of the resulting VCSEL structure is well centered in the stopband of the DBR. Pulsed and CW single mode emission with more than 30 dB side mode suppression ratio were obtained under optical pumping using standard laser diodes at 980 nm. The threshold optical pumping power of 3 mW was typical for the devices used in this study. Cavity mode wavelength of the air-gap structure at 1521 nm was measured below and above laser threshold. Cavity mode at 1523 nm both below and above threshold was measured when air gap was field up with acetone. Due to rapid evaporation of acetone cavity mode shifts back to 1521 nm in 3-5 min. Experimental results with VCSEL structures having different air gap geometry and using various liquids to fill them up are presented as well. |
| File Size | 93230 |
| File Format | |
| ISBN | 0780363191 |
| DOI | 10.1109/CLEOE.2000.910322 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2000-09-10 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Air gaps Vertical cavity surface emitting lasers Tensile strain Indium phosphide Optical pumping Wavelength measurement Gallium arsenide MOCVD Composite materials Photoluminescence |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|