Spectral Linewidth Narrowing and Tunable Two-Color Laser Operation of Two Diode Laser Arrays

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Applied Optics

DOI:https://doi.org/10.1364/AO.51.001816· OSTI ID:1038473

Liu, Bo ^[1]; Braiman, Yehuda ^[1]

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1. ORNL

We propose and implement a common external cavity to narrow spectral linewidth of two broad-area laser diode arrays (LDAs) and align their center wavelengths. The locked center wavelength of two LDAs can be tuned in the range of {approx}10 nm by tuning the tilted angle of the diffraction grating. The output beams of two LDAs are spatially overlapped through the polarization beam splitter of the common external cavity, and the total output power equals the power of two LDAs. The center wavelength of each LDA can be independently tuned by shifting the corresponding fast-axis collimation lens. As a result, the high-power two-color LDA operation is demonstrated with the tunable wavelength difference of up to 2 nm ({approx}1 THz).

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1038473
• Journal Information: Applied Optics, Vol. 51, Issue 11; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIFFRACTION GRATINGS
LASERS
POLARIZATION
TUNING
WAVELENGTHS