Wavelength conversion of 544-Gbit/s dual-carrier PDM-16QAM signal based on the co-polarized dual-pump scheme

Abstract

Due to its relative low baud rate as well as simple and cost-efficient implementation, dual-carrier polarization-division-multiplexing 16-ary quadrature amplitude modulation (PDM-16QAM) is a promising candidate for the next generation optical systems and networks at 400Gb/s per channel. The co-polarized dual-pump scheme, based on four-wave mixing (FWM) in a 1-km high nonlinear fiber (HNLF), can realize the all-optical wavelength conversion (AOWC) of the dual-carrier PDM-16QAM signal with spectral non-inversion and polarization insensitivity. We first experimentally demonstrated AOWC of the 544-Gbit/s dual-carrier PDM-16QAM signal based on the co-polarized dual-pump scheme. We investigated the conversion efficiency (CE) and optical signal-to-noise ratio (OSNR) of the converted signal at different pump spacing and pump power. We measured that the OSNR penalty is 0.6 dB due to AOWC when the bit-error ratio (BER) and pump spacing is 2 x 10-2 and 200 GHz, respectively.

Polarization-Assisted Phase-Sensitive Processor

“…Some processing applications that have already been demonstrated include wavelength conversion [1][2][3][4][5][6][7], phase regeneration [8][9][10][11][12][13], electric field decomposition of phase shift keying (PSK) signals [14][15][16] and analogue-to-digital conversion (ADC) [17]. Single-and dual-pump configurations with the signal, idler and pump(s) being aligned either along the same polarization axis (scalar schemes) or on different polarization axes (vector schemes) and either non-degenerate or degenerate configurations (with the signal and idler being at either different or the same frequency, respectively) have been demonstrated [8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

All-optical manipulation of non-degenerate FWM conversion bandwidth by gain-transparent SBS

“…In comparison, dualpump or non-degenerate FWM process provides a simple way for broadband wavelength conversion since the phase-matching condition can be maintained over a relatively wide spectral range [5,6]. Apart from a wide conversion range, polarization-insensitive operation has also been demonstrated in non-degenerate FWM [7][8][9][10]. Therefore, non-degenerate FWM is promising for wavelength conversion purpose.…”

100GHz Grid-Aligned Reconfigurable Polarization Insensitive Black-Box Wavelength Converter

“…However, for a device to be deployed in real systems, it is important that it should satisfy all the possible requirements for a wavelength converter (WC). For example, some schemes achieve a broad operational bandwidth, free of high-order mixing components, at the expense of low gains [3]; others maximize the conversion gain, neglecting however the polarization insensitivity [4,5] and different approaches achieve very low conversion penalties but only by ignoring standard frequency grids [6,7]. In addition to the above, all-optical wavelength conversion schemes should be able to support multichannel operation to drastically improve their viability and practicality.…”

“…Most proposed wavelength conversion schemes focus on optimizing certain features [3][4][5][6][7], at the expense of others. However, for a device to be deployed in real systems, it is important that it should satisfy all the possible requirements for a wavelength converter (WC).…”