Phase locking of a laser diode array is demonstrated experimentally by using an off-axis external Talbot cavity with a feedback plane mirror.Due to good spatial mode discrimination,the cavity does not need a spatial filter.By employing the cavity,a clear and stable far-field interference pattern can be observed when the driver current is less than 14A.In addition,the spectral line width can be reduced to 0.8nm. The slope efficiency of the phase-locked laser diode array is about 0.62 W/A.
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机译：Feasibility Study of Using Breath Ammonia Analysis Based on Off-Axis Cavity-Enhanced Absorption Spectroscopy with External Cavity Diode Laser for Noninvasive Real-Time Diagnosis of Helicobacter Pylori
