Dispersion is the primary affects of the optical fiber band width.
色散问题是影响光纤带宽的主要因素。
2
Nowadays, the optical pulse used in the OTDM system is often generated by the gain-switched distributed-feedback (GS-DFB) semiconductor laser, which has a large pulse width and negative chirp.
目前常采用GS-DFB半导体激光器作为OTDM系统的光脉冲源,这种脉冲源产生的光脉冲一般较宽。
3
Methods By the matrix optical method, formulae of waist width and imaging distance of focused Gaussian beams through the coupling system are derived.