Jose M. Chavez Boggio

155-nm Continuous-Wave Two-Pump Parametric Amplification

We investigate the synthesis of flat parametric response of a dual-pumped device with a distant pump separation ranging from 130 to 180 nm. The Raman contribution to the nonlinear polarization introduced predictable gain ripple and dispersion fluctuation along the highly nonlinear fiber had to be precisely accounted for. A 3-dB equalized gain was observed over 100 nm using 130-nm separated pumps. Record gain bandwidth of 155 nm was also measured for the first time.

Tunable Parametric All-Fiber Short-Wavelength IR Transmitter

In this paper, the performance of an all-fiber short-wave IR (SWIR) transmitter with wideband tunability and high peak power is reported. Transmitter construction relied on parametric process in highly nonlinear fiber to convert a seed laser at 1260 nm to 2155 nm SWIR channel with record 39 dB efficiency and translation over 900 nm spectral range. We demonstrated 61 W of peak converted power at 2 ¿m and 26 W at 2.15 ¿ m. Efficient conversion was made possible by engineered fourth-order dispersion of the highly nonlinear fiber and construction of a low-noise pump source in a 1550 nm band.

Multicast Parametric Synchronous Sampling of 320-Gb/s Return-to-Zero Signal

Technology for simultaneous demultiplexing of subrate tributaries is described and applied to 320-Gb/s return-to-zero input. The parametric architecture is scalable with respect to processed input rate and relies on cascaded all-optical multicasting and subrate sampling. Processing of 320-Gb/s input was achieved by creating eight channel copies, followed by a 20-THz-wide parametric gate. Multicasting was based on a self-seeded two-pump broadband fiber-optic parametric amplifier. The architecture was used to demonstrate error-free parallel demultiplexing of eight 320-Gb/s tributary channels at 40 Gb/s.

Mid-Infrared Wavelength Conversion in Silicon Waveguides Pumped by Silica-Fiber-Based Source

We discuss the potential of four-wave mixing (FWM) in a cascaded silica-silicon platform for generation of light in the midwave infrared (mid-IR) spectral domain. The motivation for developing light sources in mid-IR is supported by numerous applications, such as free-space communications, light detection and ranging (LIDAR), remote sensing, and medicine. These applications would greatly benefit from narrow linewidth and widely tunable laser sources with modulation capability. In this paper, a summary of existing light sources in mid-IR is given and the potential features that the proposed hybrid silica-silicon source can deliver to mid-IR applications are listed. Silica fiber is a well utilized platform at telecom wavelengths that is supported by an excellent infrastructure including tunable narrow linewidth laser sources, unsurpassed in the other spectral domains, high-bandwidth modulators, and detectors. The capability of this platform has recently been extended to the shortwave IR region (SWIR). On the other hand, silicon suffers from impairments imposed by nonlinear absorption at telecom wavelengths, but it possesses excellent linear and nonlinear optical properties in the SWIR (1.7-2.2 μm) and mid-IR (2.2-5 μm) regions. Therefore, in combination with a silica-based SWIR source, it can be utilized as an efficient FWM platform for mid-IR frequency generation.

1-to-40 10-Gb/s Channel Multicasting and Amplification in Wideband Parametric Amplifier

All-optical 1-to-40 multicasting of 10-Gb/s intensity modulated nonreturn-to-zero data is experimentally demonstrated in an architecture based on a one-pump modulated wideband parametric optical amplifier. The unique combination encompassing a wideband multicasting function and a gain function resulted in less than 0.5-dB power penalty and a minimum of 11.5-dB conversion efficiency with less than 1.35 dB of gain ripple.

All-Fiber Tunable SWIR Parametric Source at 2.4 µm

We report a record long-wavelength silica fiber optic source, capable of reaching 2.4µm, based on cascaded four-wave-mixing. The source is tunable over a spectral range of more than 130nm, with a peak power exceeding 10mW.

Dispersion Engineering in Silicon Nitride

As part of ongoing efforts towards development of integrated optoelectronic platforms on a single chip, specifically integrated photonic spectrographs for Astronomy, we report numerical and experimental results from dispersion engineering in integrated silicon nitride waveguides.

Accurate measurement of fourth order dispersion coefficient in short highly nonlinear fibers

An improved four-wave-mixing method capable of measuring ultra-low values of the fourth-order dispersion coefficient in short highly nonlinear fibers is introduced and validated experimentally.