Pulsed cascaded Raman laser
AssigneeCorning Incorporated
InventorsAndrey Korolev, Dmitri V. Kuksenkov, Vladimir Nazarov
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Abstract
A pulsed cascaded Raman laser (10) includes a pulsed light source (102) for generating a pulsed light (104) having an optical spectrum centered at a source wavelength. A non-linear Raman conversion fiber (106) is coupled to the pulsed light source (102). The pulsed light (104) traverses the nonlinear Raman conversion fiber (106) and the source power at the source wavelength is converted to a power output of an output signal (108) having an output wavelength longer than the source wavelength by a cascaded Stimulated Raman Scattering process, such that most of the source power is converted to the power of the last Stokes order in a single pass through the non-linear Raman conversion fiber (106).
Claims13
A pulsed cascaded Raman laser comprising:
- a pulsed light source generating a pulsed light having an optical spectrum centered at a source wavelength;
- and
- a non-linear Raman conversion fiber coupled to the pulsed light source, said Raman conversion fiber of said pulsed cascaded Raman laser having (i) dispersion D, and −10 ps/nm/km<D<−100 ps/nm/km, and (ii) fiber length sufficient to overcome N-th Stokes threshold, but not sufficient to overcome (N+1) Stokes threshold resulting in source power converted mostly into N-th order;
- wherein the pulsed light traverses the nonlinear Raman conversion fiber of said pulsed cascaded Raman laser and the source power at the source wavelength is converted to an output power of said pulsed cascaded Raman laser, said output power being centered at an output wavelength longer than the source wavelength by a cascaded Stimulated Raman Scattering process, such that most of the source power is converted to the power output of the last Stokes order in a single pass through the non-linear Raman conversion fiber.
A pulsed cascaded Raman laser comprising:
- a pulsed light source generating a pulsed light having pulses of approximately rectangular shape, the pulses having a peak pulse power and having an optical spectrum centered at a source wavelength;
- and
- a non-linear Raman conversion fiber coupled to the pulsed light source, the non-linear Raman conversion fiber of said pulsed cascaded Raman laser is manufactured from an optical glass transparent in the mid-infrared wavelength range, the glass made from a member selected from the group consisting of sulfides, selenides, tellurides, germanates (based on GeO2), aluminates (based on Al2O3), and tellurites (based on TeO2), wherein the pulsed light traverses the nonlinear Raman conversion fiber and the source power at the source wavelength is converted to an output power at an output wavelength in the mid-infrared wavelength range by a cascaded Stimulated Raman Scattering process, the output wavelength longer than the source wavelength, the non-linear Raman conversion fiber having such length and dispersion that most of the source power is converted to the power output of the last Stokes order in a single pass through the non-linear Raman conversion fiber.
Dependencies are inferred from the claim text.