In the third part, we investigate a mini size EDFA.The module has a dimension of 90 mm x 70 mm x 15 mm.It is twice as large as a business card.

• 第四部份为配合光塞取多工器作讯号增益补偿，利用廉价之泵激光源，来激发位于光塞取多工器前、后之掺铒光纤，使泵激光源能更有效使用。