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Littman-Metcalf based grazing-incidence external cavity broad-area laser.
A schematic diagram of the experimental apparatus. The dashed box represents the beam quality measuring setup. BS1 and BS2 represent beamsplitters; M1 and M2 are coated mirrors for near-infrared wavelength.
The average spectral bandwidth as a function of injection current (solid squares) and cavity length (open circles) with the BAL coupled to an external cavity at a center wavelength near .
Measured values as a function of injection current for a free-running BAL (solid squares) and for an externally coupled BAL (solid circles).
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