Details

Autor(en) / Beteiligte

• Li, Dan
• Yu, Yongji
• Li, Yue
• Wang, Yuheng
• Liu, Heyan
• Jin, Guang-yong

Titel

Narrow linewidth 2.1 μm optical parametric oscillator with intra-cavity configuration based on wavelength-locked 878.6 nm in-band pumping

Ist Teil von

• Optics and laser technology, 2020-11, Vol.131, p.106412, Article 106412

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• •In-band pumped by a wavelength-locked 878.6 nm LD is used.•The narrow linewidth 2.1 μm laser is obtained by using VBG.•The serious thermal effect is solved.•The output characteristics of 2.1 μm laser are studied.•A new research and design idea for high efficiency 2.1 μm laser. We report on an intra-cavity optical parametric oscillator (OPO) based on MgO-doped periodically poled lithium niobate (MgO:PPLN) crystal in-band pumped by a wavelength-locked 878.6 nm laser diode (LD). A narrow linewidth 2.1 μm laser output is obtained by using a reflection volume Bragg grating (VBG). The stability of the resonator under high pump power and the spot mode matching of the parametric laser oscillation process are considered comprehensively to determine the optimal cavity parameters. In the experiment, a narrow linewidth of 2.1 μm maximum output power of 4.7 W is obtained with the pulse duration of 8.55 ns, the linewidth of 1.89 nm at 80 kHz repetition rate, corresponding to the maximum optical-optical conversion efficiency of 11.6%.