College Honors Program

A Study of Operating Frequency of Light of a Semiconductor Laser in an Extended Optical Cavity System

Date of Creation

5-17-2024

Document Type

Campus Access Only

Department

Physics

First Advisor

Timothy Roach

Abstract

This paper will be covering the operating frequency of light of a semiconductor laser in an extended optical cavity system. Specifically, we investigate the frequencies produced by such a system as electrical current varies, bringing the laser below, at, or above threshold. We have a numerical model simulation with a total of 16 parameters that aims to predict these frequencies above threshold within 10MHz. These parameters include physical properties about the laser as well as known constants, such as the speed of light. The numerical model is compared against measured frequencies obtained by our home-built spectrometer. One aim of this study is to see if our simulation lines up well with our measured frequencies. If they line up well, the simulation can potentially be used to determine the lasing frequency for other lasers. This could mean that one may have reasonable confidence of a laser's lasing frequency if they know the extended cavity length, the current running through the laser, as well as the necessary laser characteristics.

Comments

Reader: Paul Oxley

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