Fiber amplifier technology has recently made remarkable progress in telecommunication applications, enablingdevelopment of a variety of fiber lasers and amplifiers. A new type of ultraviolet laser sources based onthe efficient nonlinear frequency conversion from fiber amplifiers has been demonstrated. Ultraviolet lasersources are essential for high-resolution measurement and testing, and these sources have advantages in termsof compactness and robustness. This paper reviews the recent developments of these UV sources including thetechnical issues involved in making high peak power fiber lasers and amplifiers which enable efficient frequencyconversion.
