A high power, continuous-wave, single-frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm

Stappel, Matthias; Steinborn, R.; Kolbe, Daniel; Walz, J.

doi:10.1088/1054-660x/23/7/075103

Cited by 13 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With a 1064 nm single-frequency fiber master oscillator power amplifier (MOPA) and a resonant cavity for enhanced SHG in LBO, a more than 20 W CW single-frequency 532 nm laser was reported [17] . Similar results have been reported at other wavelengths [18] . The challenge for further power scaling is on increasing the power of the singlefrequency YDF MOPA, which is usually limited by stimulated Brillouin scattering (SBS), and thermal management of the resonant doubling cavity.…”

supporting

confidence: 92%

33 W continuous-wave single-frequency green laser by frequency doubling of a single-mode YDFA

et al. 2017

View full text Add to dashboard Cite

A high power continuous-wave single-frequency green fiber laser by second-harmonic generation of a Yb-doped fiber amplifier (YDFA) is developed. A linearly polarized single-mode fiber amplifier produces a 60 W infrared laser at 1064 nm with a 103 W incident diode pump laser at 976 nm, corresponding to an optical conversion efficiency of 58%. An external bow-tie enhancement cavity incorporating a noncritically phase-matched lithium triborate crystal is employed for second-harmonic generation. A 33.2 W laser at 532 nm is obtained with a 45 W incident 1064 nm fundamental laser, corresponding to a conversion efficiency of 74%.OCIS Continuous-wave (CW) green lasers have many scientific and industrial applications, including laser display [1,2] , pumping of Ti-sapphire and dye lasers [3] , semiconductor mask inspection [4] , the generation of CW UV radiation by second-harmonic generation (SHG) [5] , etc. Due to the lack of solid state gain medium that can directly lase at the green spectral range, the standard method for generating a green laser is nonlinear frequency conversion. Periodically poled lithium niobate/tantalite (LiNbO 3 ∕LiTaO 3 ) or potassium titanyl phosphate (KTP) can be used to efficiently produce visible sources by a single-pass SHG of near-infrared lasers, which have a high effective nonlinear coefficient d eff . But, they are prone to damage when the incident fundamental power is higher than multiple tens of watts [6][7][8][9] . For high power applications, the use of nonlinear crystals with a higher tolerance to optical power is necessary. Lithium triborate (LBO) is an excellent nonlinear crystal with a high damage threshold, which, however, has a smaller d eff . Intracavity frequency doubling is commonly used in solid state lasers to improve the SHG efficiency by increasing the fundamental power incident on the nonlinear crystal. However, the thermal effects in the laser medium limit the output power and the optical beam quality [10,11]

show abstract

supporting

confidence: 92%

33 W continuous-wave single-frequency green laser by frequency doubling of a single-mode YDFA

et al. 2017

View full text Add to dashboard Cite

show abstract

“…M. Stopperl, et al developed an Yb fibre amplifier in continuous wave at 1091nm where a Lithium-triborate crystal to generate 545.5nm was used [17]. H. J. Lui, et al developed a tunable Ybdoped fibre amplifier with central frequency in 1064nm.…”

Section: Second Harmonic Generationmentioning

confidence: 99%

Determination of pulse energy dependence for skin denaturation from 585nm fibre laser

et al. 2014

View full text Add to dashboard Cite

In this paper, simulation and mathematical analysis for the determination of pulse energy from a Q-switched Yb 3+ -doped fibre laser is required in Port Wine Stain (PWS) treatment. The pulse energy depends on average power, gain, volume, repetition rate and pulse duration. In some treatments such as Selective Photothermolysis (SP), the peak power at the end of the optical fibre and pulse duration can be obtained and modified via a cavity design. For that purpose, a 585nm optical fibre laser full design which considers all of the above besides the average losses through the optical devices proposed for the design and the Ytterbium optical fibre overall gain will be presented.

show abstract

“…[10] generated 6.5W of green light at 532nm from 18W of 1064nm light using actively locked external cavity with 36% of efficiency. However, the external enhancement cavities required sophisticated electronic feedback loop and also a very narrowbandwidth fiber laser (about 1KHz ~ 30 MHz) [11]. To overcome the restrictions of active locking method, Cieslak et al [12] described a new approach based on an internally resonant enhancement of frequency doubling by inserting a free space bow-tie cavity inside a fiber laser cavity and passively locking of two cavities.…”

Section: Introductionmentioning

confidence: 99%

Generation of 1.8 W Continuous Green Laser at 532 nm by Passively Resonant Enhancement Technique in a Fiber Laser

Haghmoradi

Arabanian

Massudi

2020

IJOP

View full text Add to dashboard Cite

In this paper, design and fabrication of an internal resonant enhanced frequency doubling of the continuous-wave ytterbium-doped fiber laser at 1064nm using a Fabry-Perot bow tie cavity inside the fiber laser cavity is presented. The 3.5W power coupled into the enhancement cavity is amplified to 163W by the intracavity passive locking technique. By placing an LBO crystal within this resonant enhancement cavity, conversion efficiency of the second harmonic generation of the laser in continuous regime is increased from 0.023% to 51.42% (i.e. about 2200 times) which results to generation of 1.8W light at 532nm.

show abstract

A high power, continuous-wave, single-frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm

Cited by 13 publications

References 24 publications

33 W continuous-wave single-frequency green laser by frequency doubling of a single-mode YDFA

33 W continuous-wave single-frequency green laser by frequency doubling of a single-mode YDFA

Determination of pulse energy dependence for skin denaturation from 585nm fibre laser

Generation of 1.8 W Continuous Green Laser at 532 nm by Passively Resonant Enhancement Technique in a Fiber Laser

Contact Info

Product

Resources

About