Continuously tunable external cavity diode laser
OwnerBruce Richman, Giacomo Vacca +1inventors
InventorsBruce Richman, Giacomo Vacca, Guido Knippels
Life of this patent
Estimating the term…
Abstract
A cavity-enhanced spectrometer light source comprises: i) an electrically pumped SCDL having first and second facets at least said first facet being anti-reflection coated, ii) a diffraction grating facing said first facet, iii) a collimating lens interposed between said facet and said diffraction grating, iv) means for translating said lens substantially perpendicular to the path of the light beam transmitted from said SCDL to said diffraction grating to provide coarse tuning of the emission wavelength of said SCDL, and v) means for altering at least one of the temperature of and current to said SCDL to provide fine tuning of the emission wavelength of said SCDL.
Claims23
A cavity-enhanced spectrometer light source comprising:
- i) an electrically pumped semiconductor diode laser (SCDL) having first and second facets at least said first facet being anti-reflection coated,
- ii) a diffraction grating facing said first facet,
- iii) a collimating lens interposed between said facet and said diffraction grating,
- iv) means for translating said lens substantially perpendicular to the path of the light beam transmitted from said SCDL to said diffraction grating to provide coarse tuning of the emission wavelength of said SCDL, and
- v) means for altering at least one of the temperature of and current to said SCDL to provide fine tuning of the emission wavelength of said SCDL.
A spectrometer comprising:
- i) an electrically pumped SCDL having first and second facets at least said first facet being anti-reflection coated,
- ii) a diffraction grating facing said first facet,
- iii) collimating means interposed between said facet and said diffraction grating,
- iv) a stationary mirror positioned in the path of light beam diffracted by said grating,
- v) a moveable lens located between said grating and said mirror whereby transverse movement of said lens causes angular displacement of said diffracted beam
- vi) means for altering at least one of the temperature of, and current to, said SCDL to provide fine tuning of the emission wavelength of said SCDL.
Dependencies are inferred from the claim text.