NDLI: Ytterbium fiber system using a dispersion compensating fiber stretcher

Content Provider	IEEE Xplore Digital Library
Author	Verhoef, A.J. Fernandez, A. Jespersen, K. Zhu, L. Gruner-Nielsen, L. Galvanauskas, A. Baltuska, A.
Copyright Year	2011
Description	Author affiliation: OFS Denmark, Priorparken 680, 2605 Brøndby, Denmark (Jespersen, K.; Gruner-Nielsen, L.) \|\| Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, 48109-2099, USA (Galvanauskas, A.) \|\| Photonics Institute, Vienna University of Technology, Gusshausstrasse 27-387, A-1040, Austria (Verhoef, A.J.; Fernandez, A.; Zhu, L.; Baltuska, A.)
Abstract	Ytterbium doped fiber amplifiers (YDFA) delivering high-fidelity sub 200-fs pulses are very attractive scalable sources for seeding and pumping of CEP stable DFG OPAs [1]. Replacing the grating stretcher optics by a fiber-stretcher in YDFA is of key importance for achieving a robust turn-key alignment-free all-fiber integrated design. A major problem when designing a fiber stretcher is to match the dispersion requirements of the compressor unit in the whole spectral range of the pulses. Two main approaches have been used in all-fiber integrated YDFA. One relies on nonlinear CPA [2] and uses a standard single mode fiber (SMF) stretcher in combination with a pair of gratings. The main disadvantage of this scheme is that the pulse fidelity is strongly degraded with a considerably portion of the pulse energy in the pulse pedestal [3]. The other approach uses a longer polarization maintaining (PM) SMF stretcher in combination with a grism compressor, while keeping the nonlinearities low throughout the amplifier, allowing for the generation of high-fidelity µJ level pulses [1,4]. In this contribution we report on a simplified monolithic YDFA scheme that uses a non-PM dispersion compensating fiber (DCF) stretcher [5] specially designed to match the dispersion of a compressor unit consisting of a pair of 1480 lines/mm gratings. The system delivers high fidelity >5 µJ sub-165 fs pulses. The experimental setup is shown in Fig. 1. It consists of an Yb-fiber oscillator, two PM SMF preamplifiers and a PM large mode area (LMA) fiber amplifier. The seed pulses are stretched in a hybrid fiber-pulse stretcher which consists of ∼8 m of PM980 fiber (pre-stretcher) followed by 100m DCF. After the stretcher a polarization controller and inline polarizer are used to ensure linear polarization in the amplifier.
Starting Page	1
Ending Page	1
File Size	723516
Page Count	1
File Format	PDF
ISBN	9781457705335
e-ISBN	9781457705328
DOI	10.1109/CLEOE.2011.5943151
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber amplifiers Optical fiber polarization Pulse measurements Optimized production technology Fiber gratings Optical fiber dispersion
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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