Optical module

The optical module provided by the utility model comprises a first circuit board and a tunable laser module, wherein the tunable laser module is electrically connected with the first circuit board; the tunable laser module comprises a packaging cavity, a second circuit board and a flexible circuit board; the tunable laser module is electrically connected with the first circuit board through the second circuit board and the flexible circuit board. Besides, the current driving chip and the monitoring chip which are originally arranged on the first circuit board are transferred to the ceramic substrate in the packaging cavity, and the current driving chip and the monitoring chip are designed to be chips with one interface, so that the size is reduced. Then the conduction between the current driving chip and a heated object and the conduction between the monitoring chip and a monitored object are realized through an analog switch, and the normal work of each device is ensured; when the design sizes of the current