97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<ruby id="r1fq7"><xmp id="r1fq7"></xmp></ruby>

<pre id="r1fq7"><strong id="r1fq7"></strong></pre>

單項(xiàng)選擇題

What is an advantage of an externally modulated laser over a directly modulated laser？（）

A. lower cost
B. higher chirp
C. easier to manufacture
D. higher dispersion tolerance
E. higher optical signal-to-noise ratio

你可能感興趣的試題

單項(xiàng)選擇題

What is the phenomenon called where different wavelengths of light travel at different speeds？（）

A. OSNR
B. dispersion
C. light skew
D. attenuation

單項(xiàng)選擇題

Which device creates an OEO conversion？（）

A. amplifier
B. attenuator
C. regenerator
D. light emitter
E. optical switch
F. optical receiver
G. fiber-optic cable

<ruby id="ihczt"><output id="ihczt"></output></ruby>