Vikram, BS and Prakash, Roopa and Nagarjun, KP and Selvaraja, Shankar Kumar and Supradeepa, VR (2018) A versatile, C-band spanning, high repetition rate, cascaded four wave mixing based multi wavelength source. In: Conference on Nonlinear Frequency Generation and Conversion - Materials and Devices XVII, JAN 29-31, 2018, San Francisco, CA.
Full text not available from this repository.Abstract
Demand for bandwidth in optical communications necessitates the development of scalable transceivers that cater to these needs. For this, in DWDM systems with/without Superchannels, the optical source needs to provide a large number of optical carriers. The conventional method of utilizing separate lasers makes the system bulky and inefficient. A multi-wavelength source which spans the entire C-band with sufficient power is needed to replace individual lasers. In addition, multi-wavelength sources at high repetition rates are necessary in various applications such as spectroscopy, astronomical spectrograph calibration, microwave photonics and arbitrary waveform generation. Here, we demonstrate a novel technique for equalized, multi-wavelength source generation which generates over 160 lines at 25GHz repetition rate, spanning the entire C-band with total power >700mW. A 25GHz Comb with 16 lines is generated around 1550nm starting with two individual lasers using a system of directly driven, cascaded intensity and phase modulators. This is then amplified to >1W using an optimized, Erbium-Ytterbium co-doped fiber amplifier. Subsequently, they are passed through Highly NonLinear Fiber at its zero-dispersion wavelength. Through cascaded Four Wave Mixing, a ten-fold increase in the number of lines is demonstrated. A bandwidth of 4.32 THz (174 lines, SNR>15 dB), covering the entire C-band is generated. Enhanced spectral broadening is enabled by two key aspects - Dual laser input provides the optimal temporal profile for spectral broadening while the comb generation prior to amplification enables greater power scaling by suppression of Brillouin scattering. The multi-wavelength source is extremely agile with tunable center frequency and repetition rate.
| Item Type: | Conference Paper |
|---|---|
| Series.: | Proceedings of SPIE |
| Publisher: | SPIE-INT SOC OPTICAL ENGINEERING |
| Additional Information: | Conference on Nonlinear Frequency Generation and Conversion - Materials and Devices XVII, San Francisco, CA, JAN 29-31, 2018 |
| Keywords: | Multi Wavelength Source; Cascaded Four Wave Mixing; Repetition Rate; Spectral Broadening; Bandwidth Scaling; Electro Optic Modulators; Erbium-Ytterbium Co-Doped Fiber Amplifier; Optical Communication |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 28 Jan 2019 10:19 |
| Last Modified: | 28 Jan 2019 10:19 |
| URI: | http://eprints.iisc.ac.in/id/eprint/61512 |
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