Group III-Nitride-Arsenides are promising materials for 1.3 micron opto-electronic devices grown on GaAs substrates, allowing AlAs/GaAs distributed Bragg reflector (DBR) mirrors and integration with GaAs electronics. Nitrogen decreases the GaAs bandgap dramatically, and the smaller GaN lattice constant results in less strain in GaInNAs compared to InGaAs. However, the anneal necessary to achieve device quality material shifts the emission peak to shorter wavelengths. Secondary ion mass spectroscopy (SIMS) depth profiling on GaInNAs quantum wells shows that nitrogen diffusion exceeds indium diffusion during anneal. We have demonstrated broad-area lasers, pulsed lasers, and CW VCSELs. However, due to nitrogen out-diffusion from the QWs, the operating wavelength of these initial devices was shorter than 1.23µm. Subsequent use of GaNAs barriers surrounding the QWs reduced the shift of the emission peak during anneal, as the GaAsN diffused nitrogen into the QW. This also resulted in longer wavelength emission due to decreased electron confinement energy and compensted overall strain. This new active region resulted in devices emitting at 1.3 micron. The new design also improved laser characteristic temperature T0 from 105K to 146K for similar devices.

We employ a combination of direct fiber coupling and broad-band add/drop filtering to demonstrate a 4-wavelength by 10-fiber VCSEL-based transmitter in a PGA package with MT-connectorized optical output. This is the first demonstration to our knowledge of a multiwavelength VCSEL-based parallel optical fiber transmitter. Such a device is useful for future high-bandwidth low-cost data communications applications. The use of a hybrid packaging scheme employing a fiber-ribbon-guided add/drop filter enables ten fibers by four wavelengths with a wide (>10 nm) channel spacing; more wavelengths should be achievable either by using additional filters and/or by combining this approach with monolithic techniques of achieving multiple wavelengths per VCSEL die

We demonstrate a simple approach to fabricate add/drop WDM filters for byte-wide multimode fiber ribbon cable with low loss (1.0 dB) and small footprint.

We demonstrate a wavelength division multiplexing approach for byte-wide optical interconnects over multimode fiber optic ribbon cable using filters based on common plastic ferrules. A dual wavelength link with eight cascaded filter stages exhibits bit error rates {le}l0{sup -l4}.