Embedded Files
The Optronics laboratory of Florida Tech is focused on the development of the state-of-the-art optical transmission architectures. Current research endeavors focus on photonics, fiber optics, optical communications, and sensors.
There are five ways to multiplex a signal on an optical fiber. The Optronics Laboratory has invented two of those, space division / spatial domain multiplexing (SDM) and orbital angular momentum based multiplexing (OAM).
Recent activities of the lab continue to revolve around space division / spatial domain multiplexing (SDM), orbital angular momentum based multiplexing (OAM), whereas additional interest involve modified optical PAM4 modulation schemes, and free space optical communication systems.
space division / spatial domain multiplexing (SDM)
space division / spatial domain multiplexing (SDM)
A novel multiplexing technique for fiber optic communications has been developed that supports multiple channels of optical energy inside an optical fiber by confining each individual channel to a unique spatial location. These channels can operate at exactly the same wavelength as well as at different wavelengths. The basic operating principle and experimental results for spatial domain multiplexed fiber optic communication systems is presented here.
orbital angular momentum based multiplexing (OAM)
orbital angular momentum based multiplexing (OAM)
Spatial domain multiplexing (SDM) system is a MIMO (multiple input multiple output) technique which allows multiple co-propagating optical channels inside a fiber. In SDM, the individual channels are transmitted using specific but varied input angles into a multimode carrier fiber. Owing to this input angle, the trajectory of each channel can be modeled as a helical ray inside the fiber, which implies each channel carries its orbital angular momentum (OAM).
Simplified PAM4 optical signals combined with spatially multiplexed communication systems
Simplified PAM4 optical signals combined with spatially multiplexed communication systems
A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes.
Omnidirectional free space optical communications receiver
Omnidirectional free space optical communications receiver
Free space optical communication provides fiber optic bandwidths in a wireless environment. With the continued need for higher data rate in wireless telecom, free space optics (FSO) or lasercomm is an approach that combines fiber optic bandwidths with wireless transmission capability. However, highly directive sources like lasers results in strict pointing and tracking requirements on FSO systems. For short range and high data rate applications like LANs or LiFi, a simple and inexpensive omnidirectional FSO (O-FSO) receiver is desirable.
Report abuse