You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
18 February 2009Self-induced pulsing in Tm3+-doped fiber lasers with different output
couplings
Under the pump of a diode laser at 790 nm, self-pulsing phenomena of ~2 μm Tm3+-doped fiber lasers are investigated.
Laser cavity configuration is changed by using different output-coupling mirrors. When the polished fiber-end (Fresnel
reflection) is used as the output coupler, the cavity is dubbed as "bad" cavity. With this "bad" cavity, regular laser pulse
trains can be obtained near threshold pump level. The pulse width and repetition rate are several micro seconds and several kilohertz, respectively. At higher pump levels, the regular pulse-train shape is broken, and some random pulses occur. At the same time, similar mode-locking phenomenon can be observed. When the output coupler is changed to a T=10% (at 2μm) mirror, regular laser pulse train still can be observed near threshold pump. However, a slight increase of pump leads to randomization of the pulse train. Similar mode-locking phenomenon was not observed with this kind of cavity. When the output coupling is decreased to T=5%, even near the pump threshold, regular pulse train can not be achieved. With increased pump powers, laser output changes from pulse state to continuous wave. Based on the experimental results, a theoretical model is proposed and the origin of self-pulsing is discussed.
Yulong Tang andJianqiu Xu
"Self-induced pulsing in Tm3+-doped fiber lasers with different output
couplings", Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72760L (18 February 2009); https://doi.org/10.1117/12.822920
The alert did not successfully save. Please try again later.
Yulong Tang, Jianqiu Xu, "Self-induced pulsing in Tm3+-doped fiber lasers with different output couplings," Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72760L (18 February 2009); https://doi.org/10.1117/12.822920