| 1. |
- Engholm, Magnus, et al.
(författare)
-
Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping
- 2009
-
Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 34:8, s. 1285-1287
-
Tidskriftsartikel (refereegranskat)abstract
- We show that the photodarkening resistivity of ytterbium-doped fiber lasers can be greatly improved by cerium codoping. It is suggested that the coexistence of the redox couple Ce3+⁄Ce4+ in the glass provides means for trapping both hole- and electron-related color centers that are responsible for the induced optical losses in Yb-doped fiber lasers.
|
|
| 2. |
- Feugnet, G., et al.
(författare)
-
Improved laser-induced fluorescence method for bio-attack early warning detection system
- 2008
-
Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE.
-
Konferensbidrag (refereegranskat)abstract
- Laser Induced Fluorescence (LIF) could permit fast early warning systems either for point or standoff detection if a reliable classification of warfare biological agents versus biological or non-biological fluorescing background can be achieved. In order to improve LIF discrimination capability, a new system is described in which the fluorescence pattern is enriched by the use of multiple wavelength delayed excitation while usual spectral fluorescence analysis is extended to time domain to use both aspects as criteria for classification. General considerations and guidelines for the system design are given as well as results showing good discrimination between background and simulants.
|
|
| 3. |
- Jelger, Pär, et al.
(författare)
-
A Volume Bragg Grating Locked Nd:fiber Laser
- 2007
-
Ingår i: 2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007). - NEW YORK : IEEE. ; , s. 1946-1947
-
Konferensbidrag (refereegranskat)abstract
- A Neodymium doped LMA fiber is locked with a volume Bragg grating for the first time, and compared to a conventional fiber laser setup. The efficiency is improved and the linewidth is drastically reduced.
|
|
| 4. |
- Jelger, Pär, et al.
(författare)
-
All-fiber capillary electrophoresis with novel axial in-line detection
- 2008
-
Konferensbidrag (refereegranskat)abstract
- An all-fiber capillary electrophoresis system is presented. It enables sensitive in-line electrophoresis separation and fluorescence detection. As a proof of concept, a biological sample (FITC-BSA) is electrokinetically separated and analyzed.
|
|
| 5. |
- Jelger, Pär, et al.
(författare)
-
An in-fibre microcavity
- 2007
-
Ingår i: Opt.InfoBase Conf. Papers. - NEW YORK : Optical Society of America. ; , s. 1233-1234
-
Konferensbidrag (refereegranskat)abstract
- A novel all-fiber spliced microcavity for chemical and biological optical studies is described. Its design allows coupling with low loss light from a fiber into a liquid or gas contained in a capillary or PCF.
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
- Jelger, Pär, et al.
(författare)
-
Degradation-resistant lasing at 980 nm in a Yb/Ce/Al-doped silica fiber
- 2010
-
Ingår i: Journal of the Optical Society of America. B, Optical physics. - 0740-3224 .- 1520-8540. ; 27:2, s. 338-342
-
Tidskriftsartikel (refereegranskat)abstract
- In this work we measure how photodarkening affects the optical efficiency for three different Yb/Al-doped silica fibers operating at 980 nm, one of which is codoped with cerium. A volume Bragg grating is used for linewidth control and added rejection of amplified spontaneous emission. Several hours of degradation-resistant operation is obtained with the Ce-codoped fiber, while for the Yb/Al doped fibers a large drop in efficiency is observed within the first hour of operation. Our results show that Yb/Ce/Al-doped fibers could be excellent candidates for high-power 980 nm fiber laser sources.
|
|
| 9. |
- Jelger, Pär, et al.
(författare)
-
Efficient narrow-linewidth volume-Bragg grating-locked Nd : fiber laser
- 2007
-
Ingår i: Optics Express. - 1094-4087. ; 15:18, s. 11336-11340
-
Tidskriftsartikel (refereegranskat)abstract
- A neodymium doped microstructured large mode area fiber is frequency locked with a volume Bragg grating. This configuration is compared with a conventional fiber laser setup. A high efficiency (51% slope), stable output and a drastically narrowed linewidth (<0.07nm) are achieved.
|
|
| 10. |
- Jelger, Pär, et al.
(författare)
-
Efficient skew-angle cladding-pumped tunable narrow-linewidth Yb-doped fiber laser
- 2007
-
Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 32:24, s. 3501-3503
-
Tidskriftsartikel (refereegranskat)abstract
- A skew-angle cladding-pumped tunable Yb-doped fiber laser is presented. The laser was tunable over more than 30 nm, from 1022 to 1055 nm, by employing a volume Bragg grating in a retroreflector configuration as one of the cavity delimiters. Output powers in excess of 4.3 W were recorded with a spectral bandwidth of 5 GHz and an M2 value below 1.3 over the whole tuning range.
|
|
