Journal Article

PUBDB-2018-01075

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Megawatt peak power tunable femtosecond source based on self-phase modulation enabled spectral selection

Chung, H.-Y.CFEL*DESY* ; Cao, Q.CFEL*DESY* ; Song, L.CFEL* ; Kärtner, F. X.CFEL*Extern*DESY* ; Chang, G. (Corresponding author)CFEL*DESY* ; Liu, W.CFEL*

2018
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1364/OE.26.003684  doi:10.3204/PUBDB-2018-01075

Abstract: Wavelength widely tunable femtosecond sources can be implemented by optically filtering the leftmost/rightmost spectral lobes of a broadened spectrum due to self-phase modulation (SPM) dominated fiber-optic nonlinearities. We numerically and experimentally investigate the feasibility of implementing such a tunable source inside optical fibers with negative group-velocity dispersion (GVD). We show that the spectral broadening prior to soliton fission is dominated by SPM and generates well-isolated spectral lobes; filtering the leftmost/rightmost spectral lobes results in energetic femtosecond pulses with the wavelength tuning range more than 400 nm. Employing an ultrafast Er-fiber laser and a dispersion-shifted fiber with negative GVD, we implement an energetic tunable source that produces ~100-fs pulses tunable between 1.3 μm and 1.7 μm with up to ~16-nJ pulse energy. Further energy scaling is achieved by increasing the input pulse energy to ~1-μJ and reducing the fiber length to 1.3 cm. The resulting source can produce >100-nJ femtosecond pulses at 1.3 μm and 1.7 μm with MW level peak power, representing an order of magnitude improvement of our previous results. Such a powerful source covers the 2nd and the 3rd biological transmission window and can facilitate multiphoton deep-tissue imaging.

Note: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Contributing Institute(s):

1. Ultrafast Lasers & X-rays Division (FS-CFEL-2)
2. FS-CFEL-2 (CFEL-ULOCM)
3. beauftragt von UNI (UNI/CUI)

Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
2. VH-NG-804 - Towards Laboratory-Based Ultrafast Bright EUV and X-ray Sources (2015_IVF-VH-NG-804) (2015_IVF-VH-NG-804)
3. HCJRG-201 - Advanced Laser Technologies for Ultrafast Spectroscopy of Quantum Materials (2015_IFV-HCJRG-201) (2015_IFV-HCJRG-201)
4. CUI - Hamburger Zentrum für ultraschnelle Beobachtung (194651731) (194651731)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2018

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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