Abstract
An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained for conversion from a 1.06 μm pump to the 1.24 μm first Stokes. The pump had an M2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M2 2.95 to M2 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays.
| Language | English |
|---|---|
| Pages | 2506-2509 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 44 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 15 May 2019 |
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1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam. / Antipov, Sergei; Sabella, Alexander; Williams, Robert J.; Kitzler, Ondrej; Spence, David J.; Mildren, Richard P.
In: Optics Letters, Vol. 44, No. 10, 15.05.2019, p. 2506-2509.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - 1.2 kW quasi-steady-state diamond Raman laser pumped by an M2 = 15 beam
AU - Antipov,Sergei
AU - Sabella,Alexander
AU - Williams,Robert J.
AU - Kitzler,Ondrej
AU - Spence,David J.
AU - Mildren,Richard P.
PY - 2019/5/15
Y1 - 2019/5/15
N2 - An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained for conversion from a 1.06 μm pump to the 1.24 μm first Stokes. The pump had an M2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M2 2.95 to M2 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays.
AB - An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained for conversion from a 1.06 μm pump to the 1.24 μm first Stokes. The pump had an M2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M2 2.95 to M2 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays.
UR - http://www.scopus.com/inward/record.url?scp=85065974418&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/LP160101039
UR - http://purl.org/au-research/grants/arc/DP150102054
U2 - 10.1364/OL.44.002506
DO - 10.1364/OL.44.002506
M3 - Article
VL - 44
SP - 2506
EP - 2509
JO - Optics Letters
T2 - Optics Letters
JF - Optics Letters
SN - 0146-9592
IS - 10
ER -