Patent ID: 11929592
Assignee: MARVELL ASIA PTE LTD
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 11:
12. A tunable laser module comprising:
the passthrough semiconductor optical amplifier ref claim 1; and
the laser comprising a reflective semiconductor optical amplifier, the reflective semiconductor optical amplifier configured to generate the laser light and comprising
a front facet having an anti-reflective coating and configured to output the laser light,
a back facet having a reflective coating and configured to reflect the laser light to the front facet, and
a second gain medium i) extending from the front facet of the reflective semiconductor optical amplifier to the back facet of the reflective semiconductor optical amplifier, ii) in combination with the front facet and the back facet of the reflective semiconductor optical amplifier exhibiting a second mirror loss to amplify the laser light for data communication, and iii) comprising a second multilayer structure, the second multilayer structure comprising
a P-layer,
an N-layer,
an N-doped active layer disposed between the P-layer of the second gain medium and the N-layer of the second gain medium and having undoped well layers, and
N-doped barrier layers alternating with the undoped well layers of the N-doped active layer of the second gain medium between the P-layer of the second gain medium and the N-layer of the second gain medium.