| Autor: |
Chandran AM, Runcorn TH, Murray RT, Taylor JR |
| Jazyk: |
angličtina |
| Zdroj: |
Optics letters [Opt Lett] 2019 Dec 15; Vol. 44 (24), pp. 6025-6028. |
| DOI: |
10.1364/OL.44.006025 |
| Abstrakt: |
We demonstrate a nanosecond pulsed source at 620 nm with watt-level average power by frequency-doubling a 1240 nm phosphosilicate Raman fiber amplifier. A gain-switched laser diode operating at 1064 nm is amplified in an ytterbium fiber master oscillator power amplifier system and then converted to 1240 nm using a phosphosilicate Raman fiber amplifier with a conversion efficiency of up to 66%. The Raman fiber amplifier is seeded with a continuous-wave 1240 nm laser diode to obtain narrow-linewidth radiation, which is subsequently frequency-doubled in a periodically poled lithium tantalate crystal. A maximum average power of 1.5 W is generated at 620 nm, corresponding to a pulse energy of 300 nJ at a repetition rate of 5 MHz. The source has excellent beam quality ( M 2 ≤1.16) and an optical efficiency (1064 nm to 620 nm) of 20%, demonstrating an effective architecture for generating red pulsed light for biomedical imaging applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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