Optical module
The disclosure provides an optical module, including a laser, the laser including a light emitting region and a modulation region, and light emitted by the light emitting region emitting toward the modulation region; a first driver circuit, the first driver circuit being connected to the light emitting region, so that the light emitting region emits light with adjusted optical power; and a second driver circuit, the second driver circuit being connected to the modulation region, so that the modulation region changes the optical power of the light emitted from the light emitting region.
1. An optical module, comprising:
a laser including a light emitting region configured to emit a light beam and a modulation region configured to receive the light beam;
a first driver circuit connected to the light emitting region and configured to adjust an optical power of the light beam, wherein
the first driver circuit comprises a modulation circuit, and
the modulation circuit is configured to drive the light emitting region according to a first amplitude-adjusting signal from a system end; and
a second driver circuit connected to the modulation region and configured to control the modulation region to adjust the optical power of the light beam, wherein the second driver circuit is configured to drive the modulation region according to a second amplitude-adjusting signal from the system end.
2. The optical module according to claim 1 , wherein:
the first driver circuit further comprises a bias circuit connected to the light emitting region and configured to drive the light emitting region to emit the light beam with a stable optical power; and
the modulation circuit is connected to the light emitting region and configured to drive the light emitting region to adjust the optical power of the light beam.
3. The optical module according to claim 1 , wherein the system end is an electronic controlling device externally connected to the optical module.
4. The optical module according to claim 1 , wherein the second driver circuit comprises a transconductance amplifier connected between the system end and the modulation region.
5. The optical module according to claim 4 , wherein
the first driver circuit further comprises a bias circuit connected to the light emitting region;
the bias circuit outputs a current signal with adjustable amplitude to the light emitting region;
the modulation circuit outputs a current signal with adjustable amplitude to the light emitting region; and
the second driver circuit outputs a current signal with adjustable amplitude to the modulation region.
6. The optical module according to claim 4 , wherein
the frequency of the first amplitude-adjusting signal is lower than 1 Gbps; and
the frequency of the second amplitude-adjusting signal is higher than 1 Gbps.
7. The optical module according to claim 1 , wherein
the first amplitude-adjusting signal is a voltage signal or a current signal; and
the second amplitude-adjusting signal is a voltage signal or a current signal.
8. The optical module according to claim 7 , wherein
the first driver circuit further comprises a bias circuit connected to the light emitting region;
the bias circuit outputs a current signal with adjustable amplitude to the light emitting region;
the modulation circuit outputs a current signal with adjustable amplitude to the light emitting region; and
the second driver circuit outputs a current signal with adjustable amplitude to the modulation region.