APIC (Advanced Photonics Integrated Circuits) Corporation is engaged in the research,
development, and production of highly integrated photonic (HIP) and highly integrated photonic and
electronic (HIPE) chip technology for a variety of defense and homeland security applications. This
technology allows for significantly reduced chip size while also eliminating numerous pigtails and
interconnects, thereby improving system reliability while reducing cost. APIC's Mid-Pacific Photonics
Prototyping Facility (M3PF) is a Navy-funded 6" and 8" silicon-on-insulator (SOI) photonic prototyping
facility that was constructed specifically to meet this need. Among other high-tech equipment, M3PF is
equipped with a high-resolution ASML QML stepper, a lithography tool that is capable of achieving 0.25-
μm resolution with a field size of 22 mm by 32.5 mm. APIC is developing processing techniques for fiber-compatible
core-size waveguides as well as for complementary metal-oxide semiconductor (CMOS)-
compatible core-size waveguides. In this paper, APIC's SOI photonic technology and M3PF capabilities
will be described in detail. In addition, processed chips and their performance and applications will be
discussed to demonstrate the efficacy of M3PF. APIC's additional processing capabilities--such as wafer
bonding for heterogeneous integration processing, which plays a key role in HIPE chip implementation--
will be described as well.
A free space optical communication testbed using multi-channel optical code division multiplexing was demonstrated using a multiplexed optical transmitter utilizing SONET OC-12 signals, a pair of matched telescopes, and a single mode fiber coupled receiver and CDMA decoding system. An active beam alignment system was used at the receiver to maintain alignment on the receiver input fiber, with bit error rates under transmitter jitter of better than 2x10<SUP>-12</SUP> for a transmitter beam perturbation of 50 Hz and 45 (mu) rad peak to peak amplitude.
In this article, we present a variety of optical CDMA photonic chips, some with the capability of random programming the CDMA codes in the 1.55um C-band. The devices are composed of two arrayed waveguide gratings with an array of thermo-optical switches in the center, which encode and decode the optical signal for optical CDMA operation. Detailed performance of the device will be discussed.
This paper reports the growth, fabrication and characterization of integrated Ge detectors with rib waveguides based on SOI technology. The MBE Ge diode structures were first grown on different graded buffers on SOI wafers. These structures were then fabricated into individual and integrated diodes with various kinds of rib waveguides. Analysis of the performance of the integrated detectors indicates that Ge detectors with quantum efficiency over 70% can be achieved at 1.55um. Major obstacle for practical applications of these Ge detectors will be discussed.
Optical Code-Division Multiple Access technology enables simultaneous, asynchronous, multi-rate users to transmit and receive information on a single fiber and has the full compatibility with multiple protocol network solutions. In this paper, we review our development of the technology and our effort to replace the bulky optics with Silicon-On- Insulator based photonic devices, such as arrayed waveguide gratings, thermo-optical switches as well as modulators. The future market prospective of the technology will also be discussed.
Optical CDMA offers an alternate solution for video transport/switching to WDMA. Optical CDMA potentially provides a large number of virtual optical circuits for video distribution and channel selection. In a video network, it provides asynchronous, multi-rate, multi-channel communication with network scalability, reconfigurability (channel on demand), and network security (provided by inherent CDMA coding). We have demonstrated a video transport/switching system over a distance of 40 Km using discrete optical components in our laboratory. We are currently pursuing Photonic Integrated Circuit implementation. In this paper, we will describe the optical CDMA video transport/switching system concept/features, the demonstration system, and the network applications to Hybrid Fiber/Coaxial, Fiber-To-The-Curb and Fiber-To-The-Home.
Optical CDMA is a complementary multiple access technology to WDMA. Optical CDMA potentially provides a large number of virtual optical channels for IXC, LEC and CLEC or supports a large number of high-speed users in LAN. In a network, it provides asynchronous, multi-rate, multi-user communication with network scalability, re-configurability (bandwidth on demand), and network security (provided by inherent CDMA coding). However, optical CDMA technology is less mature in comparison to WDMA. The components requirements are also different from WDMA. We have demonstrated a video transport/switching system over a distance of 40 Km using discrete optical components in our laboratory. We are currently pursuing PIC implementation. In this paper, we will describe the optical CDMA concept/features, the demonstration system, and the requirements of some critical optical components such as broadband optical source, broadband optical amplifier, spectral spreading/de- spreading, and fixed/programmable mask.