Seven-core fiber Raman laser with fs-inscribed random structures

Mikhail I. Skvortsov; Victor I. Labuntsov; Alexey A. Wolf; Alexandr V. Dostovalov; Sergey A. Babin

doi:10.1117/12.2592527

18 April 2021 Seven-core fiber Raman laser with fs-inscribed random structures

Mikhail I. Skvortsov, Victor I. Labuntsov, Alexey A. Wolf, Alexandr V. Dostovalov, Sergey A. Babin

Proceedings Volume 11773, Micro-structured and Specialty Optical Fibres VII; 117730H (2021) https://doi.org/10.1117/12.2592527
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

We report on the demonstration and characterization of Raman laser generating at the wavelength of ~1090 nm with total output power of up to 5 W based on the 7-core passive fiber with coupled cores. The Raman gain in all cores is provided by the pump laser connected to the FBG-free central core, whereas the laser cavity is formed by two sets of highly-reflective fiber Bragg gratings (FBGs) inscribed by fs pulses in all peripherical cores at the both ends of the 7-core fiber. The output FBG set has got a random shift along the axis between individual FBGs thus forming a random array of FBGs. Along with the Stokes line narrowing reasoned by the reduction of spectral broadening via nonlinear effects due to the enlargement of effective mode area in the multicore fiber with coupled cores in comparison with a standard singlemode fiber Raman laser, the additional line narrowing effect induced by the multicore random FBG array has been also revealed. It results in the generation of single peak of <30 pm linewidth near the threshold, whereas the linewidth broadens to ~250 pm at maximum power. At that, the single peak generation at low powers is not stable in time converting at some moments to multiple 20- pm peaks with random spacing and amplitudes defined by the interference of beams reflected from individual output FBGs with random longitudinal shifts. The ways to stabilize the generated spectrum are discussed.

Conference Presentation

Citation Download Citation

Mikhail I. Skvortsov, Victor I. Labuntsov, Alexey A. Wolf, Alexandr V. Dostovalov, and Sergey A. Babin "Seven-core fiber Raman laser with fs-inscribed random structures", Proc. SPIE 11773, Micro-structured and Specialty Optical Fibres VII, 117730H (18 April 2021); https://doi.org/10.1117/12.2592527

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