Stephen G. Grubb

Fiber gratings in lasers and amplifiers

The emergence of UV-written fiber gratings, both short and long period, as a reliable fiber technology has revolutionized the field of active fiber devices. The advantageous properties of spectral selectivity, low insertion loss, and component ruggedness have made devices possible that would not be viable without their use. The use of fiber gratings in conjunction with erbium-doped fiber amplifiers (EDFAs), fiber lasers, and with semiconductor diode lasers is reviewed.

The Realization of Large-Scale Photonic Integrated Circuits and the Associated Impact on Fiber-Optic Communication Systems

Large-scale photonic integrated circuits (LS PICs) have been extensively deployed throughout the fiber optic communication network. This paper discusses the properties of the LS PICs, the interaction between them, and what is necessary to create an optical transport system that fully utilizes the properties of the LS PIC

Large-scale photonic integrated circuits for long-haul transmission and switching

Feature Issue on Nanoscale Integrated Photonics for Optical Networks Dense wavelength division multiplexed (DWDM) large-scale, single-chip transmitter and receiver photonic integrated circuits (PICs), each capable of operating at 100 Gbits/s, have been deployed in the field since the end of 2004. These highly integrated InP chips have significantly changed the economics of long-haul optical transport networks. First, a review of the ten-channel, 100 Gbits/s PIC is presented. Then two extensions of the technology are demonstrated; first is wide temperature, coolerless operation of the 100 Gbits/s PIC, and second is a single integrated chip with 40 channels operating at 40 Gbits/s, capable of an aggregate data rate of 1.6 Tbits/s.

Raman amplifiers for broadband communications

Summary form only given. Summary form only given. The spectral response of Raman amplification, being a nonresonant process, is dependent only on the pump(s) frequency and bandwidth. The Raman amplification is frequency shifted by 13.2 THz and has a 3-dB bandwidth of approximately 25 nm in the 1550-nm window. By the proper choice of pump wavelength one can exactly position the Raman spectral shape to control the gain position and/or complement erbium doped fiber amplifier (EDFA) gain. A hybrid erbium/Raman amplifier has recently been demonstrated having a 3-dB gain bandwidth of 67 nm, from 1549-1600 nm.

Solid-state laser pumping of 1.5-μm optical amplifiers and sources for lightwave video transmission

An optical power amplifier and a laser source are demonstrated at 1.5 μm. A diode-pumped Nd:YAG laser is used as the pumping source for an Er/Yb co-doped gain medium. The power scaling advantages of this approach are demonstrated. Up to +21 dBm of output power is obtained from the Er/Yb amplifier and up to +19 dBm is obtained from the laser source. The Er/Yb power amplifier was deployed in a 42-channel AM link with 40 km of fiber, and an optical loss budget of 18 dBm was demonstrated.

Advances in Photonic Integrated Circuits (PIC) and Their Impact on Fiber Optic Transmission Systems

This paper will discuss the development of large-scale photonic integrated circuits (LS PICs) that enable greater penetration of digital signal management into the network. These LS PICs dramatically change the cost structure of conversion of the signal between the optical and electronic domains and thus enable the utilization of the vast array of available technologies for digital signal management, such as performance monitoring, fault sectioning, switching, grooming, and routing at a greatly improved depth within the network