| 摘要 |
An optical transceiver having an integrated structure comprises a substrate 1, a VCSEL 2 on the substrate 1 to transmit an optical signal of a first wavelength in a first direction along an optical path, and a reception photodiode 6 integrated with the VCSEL 2 on the substrate 1 to detect an optical signal of a second wavelength, which is different to the first wavelength, travelling along the optical path in a second direction opposite to the first direction. The VCSEL 2 and the reception photodiode 6 are positioned in sequence along the optical path and one of the devices, for example the photodiode 6, is adapted to allow one of the optical signals to pass through it in its passage along the optical path. The fact that the two devices are integrated in this manner, either by being grown on a common substrate or by flip-chip bonding, means that such an optical transceiver is capable of bidirectional optical communication over a single optical fibre without requiring the use of additional optical components to increase coupling efficiency to the optical fibre. This renders further components on the substrate unnecessary, and enables the transceiver to be produced at very low cost.
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