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Heterogeneous integration enables high performance active components such as lasers, modulators, and photodetectors to be elegantly integrated on a silicon photonics platform with high performance passive components. This platform also offers the unique capability to combine different types of active devices with separately optimized materials on the same wafer, die, and photonic integrated circuit...
In this talk, we review recent progress of monolithic, wavelength-swept vertical-cavity surface-emitting lasers (VCSELs) and their applications. A typical electrically-pumped VCSEL consists of two oppositely doped distributed Bragg reflectors (DBRs) with a cavity layer in between. In the center of the cavity layer resides an active region, consisting of multiple quantum wells. Due to the short cavity...
A tunable dual-mode operation with three-section distributed Bragg reflector (DBR) laser is proposed for compact and low-cost microwave generation. Stable dual-mode operation with 7 nm tuning range is demonstrated.
A controllable optical feedback system was set up to investigate the linewidth of the RF signals generated by a two-section DFB laser. A very narrow line (its width less than 100 kHz) can be detected when both sections are under the influence of optical feedback.
Optical power-spectral density of an external-cavity diode laser under coherence-selectable operation was optimized. The laser had an intracavity half-wave plate that rotates the polarization axis with regard to the grating for achieving the coherence-selectable operation. It was also shown that the resultant variation in polarization state can be readily compensated.
Relative intensity noise (RIN) characteristics of mutually injection locked distributed feedback (DFB) laser diodes is investigated. RIN around the relaxation oscillation frequency in both lasers is found to be simultaneously suppressed in the mutual locking status.
We demonstrate a novel tunable distributed feedback laser diode (DFB-LD) array with dual output of 13 dBm and 10 dBm, which can be used as full L-band light source for an optical transmitter and a local oscillator simultaneously in a coherent optical communication system.
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