Broadband and continuous wave pumped second-harmonic generation from microfiber coated with layered GaSe crystal
Opto-Electronic Advances, ISSN: 2096-4579, Vol: 6, Issue: 9, Page: 230012-230012
2023
- 11Citations
- 7Captures
- 1Mentions
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Most Recent News
Broadband and continuous wave pumped second-harmonic in microfiber
A new publication from Opto-Electronic Advances, 10.29026/oea.2023.230012 discusses broadband and continuous wave pumped second-harmonic in microfiber. Second-order optical nonlinear effects have received widespread attention from
Article Description
The conversion-efficiency for second-harmonic (SH) in optical fibers is significantly limited by extremely weak second-or-der nonlinearity of fused silica, and pulse pump lasers with high peak power are widely employed. Here, we propose a simple strategy to efficiently realize the broadband and continuous wave (CW) pumped SH, by transferring a crystalline GaSe coating onto a microfiber with phase-matching diameter. In the experiment, high efficiency up to 0.08 %Wmm is reached for a C-band pump laser. The high enough efficiency not only guarantees SH at a single frequency pumped by a CW laser, but also multi-frequencies mixing supported by three CW light sources. Moreover, broadband SH spectrum is also achieved under the pump of a superluminescent light-emitting diode source with a 79.3 nm bandwidth. The pro-posed scheme provides a beneficial method to the enhancement of various nonlinear parameter processes, development of quasi-monochromatic or broadband CW light sources at new wavelength regions.
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