Fundamental scaling limits and bandwidth shaping of frequency-modulated combs

Mithun Roy; Zhenyang Xiao; Sadhvikas Addamane; David Burghoff

doi:10.1117/12.3029602

1 October 2024 Fundamental scaling limits and bandwidth shaping of frequency-modulated combs

Mithun Roy, Zhenyang Xiao, Sadhvikas Addamane, David Burghoff

Proceedings Volume 13141, Terahertz Emitters, Receivers, and Applications XV; 1314102 (2024) https://doi.org/10.1117/12.3029602
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Frequency-Modulated (FM) combs based on active cavities, such as quantum cascade lasers, have recently shown potential as light sources across various spectral regions. Unlike passive mode-locking, which generates amplitude modulation from the field’s amplitude, FM comb formation relies on phase modulation from the field’s phase, essentially acting as a phase-domain version of passive mode-locking. While the fundamental scaling laws of passive mode-locking have been well-established since Haus’s 1975 work showing that the bandwidth of pulses mode-locked by a fast saturable absorber is proportional to the effective gain bandwidth, the limits of FM combs have been less clear. This talk will discuss our recent findings, demonstrating that FM combs based on fast gain media adhere to the same fundamental limits, resulting in combs with bandwidths linear in the effective gain bandwidth. Theoretically, I will show that the diffusive effect of gain curvature constrains comb bandwidth and experimentally how this limit can be increased, particularly focusing on terahertz quantum cascade lasers.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mithun Roy, Zhenyang Xiao, Sadhvikas Addamane, and David Burghoff "Fundamental scaling limits and bandwidth shaping of frequency-modulated combs", Proc. SPIE 13141, Terahertz Emitters, Receivers, and Applications XV, 1314102 (1 October 2024); https://doi.org/10.1117/12.3029602

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available