Ultra-long fiber Raman lasers: design considerations

I. Koltchanov; D. I. Kroushkov; A. Richter

doi:10.1117/12.2076752

16 March 2015 Ultra-long fiber Raman lasers: design considerations

I. Koltchanov, D. I. Kroushkov, A. Richter

Proceedings Volume 9359, Optical Components and Materials XII; 935905 (2015) https://doi.org/10.1117/12.2076752
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

In frame of the European Marie Currie project GRIFFON [http://astonishgriffon.net/] the usage of a green approach in terms of reduced power consumption and maintenance costs is envisioned for long-span fiber networks. This shall be accomplished by coherent transmission in unrepeatered links (100 km – 350 km) utilizing ultra-long Raman fiber laser (URFL)-based distributed amplification, multi-level modulation formats, and adapted Digital Signal Processing (DSP) algorithms. The URFL uses a cascaded 2-order pumping scheme where two (co- and counter-) ∼ 1365 nm pumps illuminate the fiber. The URFL oscillates at ∼ 1450 nm whereas amplification is provided by stimulated Raman scattering (SRS) of the ∼ 1365 nm pumps and the optical feedback is realized by two Fiber Bragg gratings (FBGs) at the fiber ends reflecting at 1450 nm. The light field at 1450 nm provides amplification for signal waves in the 1550 nm range due to SRS. In this work we present URFL design studies intended to characterize and optimize the power and noise characteristics of the fiber links. We use a bidirectional fiber model describing propagation of the signal, pump and noise powers along the fiber length. From the numerical solution we evaluate the on/off Raman gain and its bandwidth, the signal excursion over the fiber length, OSNR spectra, and the accumulated nonlinearities. To achieve best performance for these characteristics the laser design is optimized with respect to the forward/backward pump powers and wavelengths, input/output signal powers, reflectivity profile of the FBGs and other parameters.

Citation Download Citation

I. Koltchanov, D. I. Kroushkov, and A. Richter "Ultra-long fiber Raman lasers: design considerations", Proc. SPIE 9359, Optical Components and Materials XII, 935905 (16 March 2015); https://doi.org/10.1117/12.2076752

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fiber Bragg gratings

Signal attenuation

Scanning probe microscopy

Rayleigh scattering

Raman spectroscopy

Reflectivity

Interference (communication)

Show All Keywords

Keywords/Phrases

Search In:

Publication Years