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Repetition-frequency-tunable mode-locked surface emitting semiconductor laser between 278 and 787 GHz
We report a repetition frequency tunable, passively mode-locked vertical-external-cavity surface-emitting semiconductor laser (VECSEL) with continuous repetition frequency tuning between 2.78 and 7.87 GHz using mechanical tuning of the laser cavity length. The laser emits neartransform-limited, sub-500-fs pulses over almost an octave tuning range between 2.78 and 5 GHz. At repetition rates above 6 GHz the pulse duration increases to ~2.5 ps. Over the entire tuning range the laser emits andoi:10.1364/oe.19.023453 pmid:22109222 fatcat:xo2w5peozbgxncsdzci4x5xmhq