Electrical characterization of 1 X 2 coherent VASEL arrays

Hwang, Joseph

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https://hdl.handle.net/2142/104018 Copy

Description

Title

Electrical characterization of 1 X 2 coherent VASEL arrays

Author(s)

Hwang, Joseph

Contributor(s)

Choquette, Kent D.

Issue Date

2019-05

Keyword(s)

• semiconductor lasers
• photonics
• VCSEL
• laser arrays
• electrical derivative analysis
• coherently coupled arrays

Abstract

Two adjacent semiconductor vertical cavity surface-emitting lasers (VCSELs) can be tuned to coherent operation where optically-coupled VCSELs exhibit array “super-modes”, unique from individual laser cavity optical modes. Coherent VCSEL arrays have several important device properties for potential applications including increasing intensity modulation rate for high speed optical communications and all-optical beam-steering. Currently, however, coherently coupled operation is only recognized from far-field optical intensity distribution measurements. This thesis reports the investigation of both optical and electrical characteristics of 2 x 1 VCSEL arrays to identify an electrical “signature” or series resistance features in coupled lasers as a means for detecting and biasing to coherent operation. Measurement methods using two varying inputs for characterizing the VCSEL arrays are demonstrated and a voltage derivative analysis is presented.

Type of Resource

text

Language

en

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http://hdl.handle.net/2142/104018

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