See us at OFC’ 2013 BOOTH # 3253 613- 599- 1000 I info@ jgroptics. com I www. jgroptics. com Ask us about our short lead- time! o p t i c s JGR Optical Switch A- Configuration: 1xN C- Configuration: MxN Non- blocking B- Configuration: Ganged 1xN ( MxN) Configurations 1xN or 2XN Stepper Motor Switch Single- mode or Multimode Low Insertion Loss = 0.70dB Backreflection SM = - 60 dB & MM = - 40dB Excellent Repeatability = ± 0.005dB GPIB/ RS232/ USB interface via USB- DB9 adapter 100G coherent pluggable transceivers ( InP) will make these next generation coherent networks possible. Key optical building blocks There are several challenges in the introduction of compact, monolithic devices for 100G – with these key optical components being required: • Full- band tunable laser with high power, narrow linewidth, and low phase noise, both for the signal transmission laser and to act as a local oscillator in the receiver. • I& Q modulator with low electrical drive power, low insertion loss, low chirp, and high extinction ratio. • Dual- polarization I& Q coherent receiver, incorporating 90 ° optical hybrids and dual balanced photodetectors for each polarization state, coupled to TIAs that provide the electrical outputs to feed the analog- to- digital converters ( ADCs) for subsequent digital processing of the incoming signals. Only a successful combination of all these building blocks will enable the next generation of pluggable coherent optics. Let’s look at these components in more detail. Tunable lasers. Narrow- linewidth tunable lasers are now available based on the Digital Supermode Distributed Bragg Reflector ( DS- DBR) design, which has been the basis for a range of ITLA, ITTA, and small- formfactor ( SFF) transponder products for 10 and 40 Gbps for many years. 1 A key recent accomplishment has been to advance this monolithic design to achieve the low phase noise characteristics needed for coherent systems, without the need for an external cavity. First generation coherent systems have generally employed externalcavity lasers, which tend to be larger and more complex than singlechip approaches and have limited potential for photonic integration. A typical DBR laser consists of an optical gain section, phase control section, front reflector, and DBR reflector section to provide wavelength selectivity of allowed longitudinal cavity modes. Current injection into the DBR and phase control sections produces a change Custom configuration? Just ask.. FEATURE