Femtosecond Lasers with Diode Pumping for Using in Precision Metrology and Optical Fiber Communication

摘要

The recent merge of precision optical frequency metrology and ultrafast laser technology has made a profound impact to a number of scientific disciplines, including fundamental physical tests, precision spectroscopy in chemistry, biology, and material science, metrological support in space science, and coherent quantum control. For the area of frequency metrology on which this proposal is focused, we expect a significant increase in the stability and accuracy of frequency standards is needed and is ready to be developed, especially in light with the identification of optically based transitions with extremely high quality factors. Phase coherent connection between the optical and microwave spectral regions has now been established with direct optical frequency synthesis, with a qualitatively new regime being developed owing to the introduction of precise femtosecond laser based optical frequency comb technology. At the present time, optical fiber communication lines (OFCL) are widely used. One way for increasing the OFCL transmission capacity is the spectral separation of channels. For this, a stable chain of working optical frequencies is necessary. It is convenient to use the radiation from a stabilized femtosecond laser as such a frequency chain. The prospects for using such femtosecond synthesizers for OFCL are confirmed by the fact that there are many publications on this theme. .In first stage we propose to develop an ideal alternative system based on femtosecond diode-pumped ytterbium-laser. The use of diode pumping for crystalline lasers makes it possible to construct compact, highly efficient, as well as economical laser systems. The relatively low thermal load and compactness of the laser system help to create stable optical resonators and to obtain highly reliable laser operating parameters. A femtosecond comb system based on a Yb-laser will be much more compact and economical than its Ti:S counterpart.