High-Gain Long-Lived Amplified Spontaneous Emission from Dye-Doped Fluorinated Polyimide Planar Waveguides
✍ Scribed by Luis Cerdán; Angel Costela; Inmaculada García-Moreno; Olga García; Roberto Sastre; Mariola Calle; Dulce Muñoz; Javier de Abajo
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 356 KB
- Volume
- 210
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Long‐lived amplified spontaneous emission (ASE) action is demonstrated in waveguides based in transparent newly synthesized fluorinated polyimides (FPI) doped with laser dye Pyrromethene 597. Relevant parameters to optimize the lasing performance of the guides are the polymer chain density and fluorine content. The guide with the higher fluorine content was the most stable, with the ASE emission remaining at 50% of its initial value after 40 000 pump pulses of ≈220 kW · cm^−2^ delivered at a repetition rate of 5 Hz. Net gains of up to 93 cm^−1^ were obtained at a pump intensity of about 500 kW · cm^−2^ (34 µJ pulse^−1^).
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