Narrow linewidth, stabilized semiconductor laser source
AssigneeE-Tek Dynamics, Inc.
InventorJing-Jong Pan
Life of this patent
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Abstract
A semiconductor laser source having a laser diode and a fiber Bragg grating is described. The laser diode has first and second facets from which output light is emitted. A first end of the fiber Bragg grating is located near the second facet to receive output light from the laser diode. The fiber Bragg grating has a very narrow linewidth about a selected wavelength and reflects output light in the selected narrow linewidth back into the laser diode through its second facet. The output light emitted from the first facet has a very narrow linewidth about the selected linewidth.
Claims21
A semiconductor laser source comprising
- a laser diode having first and second facets from which output light is emitted;
- and
- a fiber Bragg grating having a first end proximate said second facet for receiving output light therefrom, said fiber Bragg grating having a selected narrow linewidth to reflect output light in said selected narrow linewidth back into said second facet so that output light emitted from said first facet has a very narrow linewidth.
A semiconductor laser source comprising
- a package housing;
- a first thermoelectric unit and a second thermoelectric unit mounted to said package housing;
- a laser diode having first and second facets from which output light is emitted, said laser diode mounted to said first thermoelectric unit to maintain said laser diode at a predetermined temperature;
- a fiber Bragg grating having a first end proximate said second facet for receiving output light therefrom, said fiber Bragg grating having a selected narrow linewidth to reflect output light in said selected narrow linewidth back into said laser diode so that output light emitted from said first facet has a very narrow linewidth;
- and
- a piezoelectric transducer mounted to said second thermoelectric unit to maintain said piezoelectric transducer at said predetermined temperature, said piezoelectric transducer holding said fiber Bragg grating so that said fiber Bragg grating is protected from thermal expansion and contraction.
A subassembly for tuning a fiber Bragg grating comprising
- a piezoelectric transducer responsive to electrical signals;
- a fiber Bragg grating;
- a tubing mounted to said piezoelectric transducer and enclosing said fiber Bragg grating, said tubing comprising a material having a thermal coefficient approximately that of said fiber Bragg grating, said piezoelectric transducer expanding and contracting said tubing to tune said fiber Bragg grating.
Dependencies are inferred from the claim text.