Abstract
A sinusoidal small-signal circuit model is presented for an external-cavity semiconductor diode laser with either weak or strong external optical feedback provided by a grating. It is shown that the effects of optical feedback can be modeled by two voltage sources correlated to the modulated injection current of the diode laser. The magnitudes of these two voltage sources are proportional to the product of the optical feedback level and the modulation amplitude. This result supports the idea of modulating a diode laser by optical injection. The small-signal intensity modulation and FM response characteristics of this circuit model are also presented. The response curves exhibit oscillations with the periods determined by the modulation feedback phase delay. These results agree with the results obtained elsewhere. For a short external-cavity limit, the response curves are reduced to the curves obtained elsewhere for a diode laser without an external cavity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
