Ka chef laze a dwe sibdivize an sifas-emet ak kwen-emet baton laze selon ki kalite emisyon limye:
(1) Sifas la emet laze chip se yon chip VCSEL, ki se apwopriye pou sen kout-distans;
(2) kwen-emet laze chip laze gen ladan FP, DPF ak anl chips.
Chip FP la se apwopriye pou sen distans mwayen ak kout, ak DFB a ak anl chip se apwopriye pou distans mwayen ak sen long ak sen vites segonde.
Chip la Anl ajoute yon modilate elektwo-absorption sou baz la nan DFB chip la ogmante pouvwa a pwodiksyon, pousantaj transmisyon ak estabilite tanperati nan laze a.
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