工作在L波段的多波长Er3 /Yb3 共掺光纤激光器

采用Er^3 ／Yb^3 共掺双包层光纤(EYDF)作为增益介质，利用一段标准的多模光纤作为空间梳状滤波器，于室温下实现了5个波长的稳定输出。通过调节偏振控制器的状态，可以实现对波长振荡个数和波长间隔的控制。腔中不加任何的稳定装置，在激光输出功率高于207mw时，仍能够得到多波长的稳定振荡，单一波长的线宽窄于0．15nm，边模抑制比大于32dB。通过优化单模光纤与多模光纤的熔接，选择更加合适的多模光纤，可实现更多波长个数的稳定的多波长输出。

Multiwavelength Er3 /Yb3 Co-doped Fiber Ring Laser Operating in L-band

An Er~(3+)/Yb~(3+) co-doped double clad fiber(EYDF) was used as gain medium,up to five laser wavelengths are simulataneously observed at room temperature,by incorporation of a stadard multimode optical fiber into an otherwise single-mode fiber ring cavity as a spatial mode-beating filter.The number of lasing wavelength and wavelength spaces can be controlled by changing the state of polarization controller.Without any stabilization equipment,the stable multiwavelength lasing output is obtained,with an output power of 207 mW,the line width less than 0.15 nm and side-mode-suppression-ratio above 32 dB.Using the multimode fiber that supports only a few waveguide modes and optimizing the fusion splices between single-mode and multimode fibers,the stable laser oscillation with more wavelengths can be achieved.