Work

Measurement of linewidth and noise dependence on the optical feedback parameter C by means of an FM-Converted Self-Mix interferometer

Year: 2025

Type: article

Abstract: Using a frequency-converted self-mix interferometer, we analyze with a new comprehensive approach, and then confirm with measurement results, the dependence of Schawlow-Townes (S-T) linewidth, frequency uncertainty linewidth and frequency noise spectral density from the optical feedback (or Acket’s) parameter C. Theoretically, the S-T linewidth and the noise spectral density are both dependent on (1 + C) -2 , whereas the frequency uncertainty varies as (1 + C) -1 . We test these dependences with new original measurements, taken on two laser diodes with different emission wavelengths and linewidth and find excellent agreement with the theory.

Source: Optics & Laser Technology

DOI: 10.1016/j.optlastec.2025.114154

Authors: Parisa Esmaili, Michele Norgia, Alfred Albert, San-Liang Lee, Silvano Donati

Institutions: Politecnico di Milano, National Taiwan University of Science and Technology, University of Pavia

Language: English

Topic: Semiconductor Lasers and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,230

Funders: National Science and Technology Council, European Commission, Northeastern State University, NextGenerationEU