High-Power, Low-Noise 1.5-mu m Slab-Coupled Optical Waveguide (SCOW) Emitters: Physics, Devices, and Applications
Abbreviated Journal Title
IEEE J. Sel. Top. Quantum Electron.
External-cavity lasers; mode-locked lasers; noise figure; optical; waveguides; power amplifiers; quantum-well devices; semiconductor; optical amplifiers; single-frequency lasers; QUANTUM-WELL LASERS; EXTERNAL-CAVITY LASER; SEMICONDUCTOR-LASER; OUTPUT; POWER; 2-PHOTON ABSORPTION; MODE; AMPLIFIERS; WAVELENGTH; SATURATION; DESIGN; Engineering, Electrical & Electronic; Optics; Physics, Applied
We review the development of a new class of high-power, edge-emitting, semiconductor optical gain medium based on the slab-coupled optical waveguide (SCOW) concept. We restrict the scope to InP-based devices incorporating either InGaAsP or InGaAlAs quantum-well active regions and operating in the 1.5-mu m-wavelength region. Key properties of the SCOW gain medium include large transverse optical mode dimensions ( > 5 x 5 mu m), ultralow optical confinement factor (Gamma similar to 0.25-1%), and small internal loss coefficient (alpha(i) similar to 0.5 cm(-1)). These properties have enabled the realization of 1) packaged Watt-class semiconductor optical amplifers (SOAs) having low-noise figure (4-5 dB), 2) monolithic passively mode-locked lasers generating 0.25-W average output power, 3) external-cavity fiber-ring actively mode-locked lasers exhibiting residual timing jitter of < 10 fs (1 Hz to Nyquist), and 4) single-frequency external-cavity lasers producing 0.37-W output power with Gaussian (Lorentzian) linewidth of 35 kHz (1.75 kHz) and relative intensity noise (RIN)<-160 dB/Hz from 200 kHz to 10 GHz. We provide an overview the SCOW design principles, describe simulation results that quantify the performance limitations due to confinement factor, linear optical loss mechanisms, and nonlinear two-photon absorption (TPA) loss, and review the SCOW devices that have been demonstrated and applications that these devices are expected to enable.
Ieee Journal of Selected Topics in Quantum Electronics
"High-Power, Low-Noise 1.5-mu m Slab-Coupled Optical Waveguide (SCOW) Emitters: Physics, Devices, and Applications" (2011). Faculty Bibliography 2010s. 1448.