Optical frequency stabilisation of high-power laser diodes under modulation using short optical waveguides

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Optical frequency stabilisation of high-power laser diodes under modulation using short optical waveguides

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A waveguide stabilised laser diode (WSLD) demonstrated high-power single optical frequency operation under both CW and modulated conditions. This device consisted of an AlGaAs CSP laser coupled to an external cavity constructed from a 200 μm-long single-mode ion-exchange waveguide. With an average optical power of 9 mW, the WSLD demonstrated a side-mode suppression ratio greater than 570:1 under CW conditions and greater than 310:1 under modulation with a modulation index of greater than 0.95 at 250 MHz.

Inspec keywords: III-V semiconductors; laser frequency stability; semiconductor junction lasers; aluminium compounds; optical modulation; gallium arsenide

Other keywords: optical power; modulation index; waveguide stabilised laser diode; high-power laser diodes; short optical waveguides; external cavity; optical frequency stability; AlGaAs CSP laser; high-power single optical frequency operation; III-V semiconductors; side-mode suppression ratio; semiconductor junction lasers; single-mode ion-exchange waveguide

Subjects: Laser resonators and cavities; Semiconductor lasers; Lasing action in semiconductors; Laser beam modulation, pulsing and switching; mode locking and tuning; Laser resonators and cavities

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