Multiwavelength based on nonlinear optics of intensity and phase modulators

Abstract

Abstract. This paper presents a simple method for generating multiwavelength using a nonlinear effect of cascaded intensity and phase modulators. Both of the modulators are driven by sinusoidal waveform. The multiwavelength lasing can be achieved by setting the ideal value of the amplitude of the sinusoidal waveform, and the flatness of the generated wavelengths can be improved by setting an optimum value of the direct current (DC) bias of intensity modulator. Moreover, single-mode fiber along with Raman scattering effect is needed to amplify and suppress the side bands; hence, a customized number of wavelengths can be achieved. Results show that more flatness wavelengths could be achieved when the DC bias to amplitude ratio is within the range (α ¼ 0.1 to 0.14). Moreover, α to phase modulator's voltage ratio should be 0.1. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

Broadband Enhancement of Optical Frequency Comb Using Cascaded Four-Wave Mixing in Photonic Crystal Fiber

“…Using the same parameters mentioned in [11], the configuration managed to create 29, 55 lines within power fluctuation of 0.8 dB and 2 dB, respectively, as PM output spectrum as shown in inset (a), Figure 1. The generated spectrum was utilized as an initial comb, which is amplified by two optical amplifiers, so all the lines will have almost the same power equal to 32 dBm.…”

“…Zhang et al used highly nonlinear photonic crystal fiber (PCF) to generate wavelength-tunable optical pulse train based on four-wave mixing [1]. An alternative configuration based on nonlinear effect of intensity and phase modulators was implemented to generate OFC [9][10][11]. Unfortunately, using configuration with small number of phase modulators led to either poor flatness over large bandwidth or a limited number of lines over small flat bandwidth, the only way to achieve wide flat bandwidth by cascading many modulators, which is very expensive.…”

Broad optical bandwidth based on nonlinear effect of intensity and phase modulators through intense four-wave mixing in photonic crystal fiber

“…63 lines within 3.7 dB. 13 Therefore, using these parameters in this paper, the simulation results, inset A in Fig. 1, show that the seed combs centered at 1532 and 1555 nm, which feed into PCF with the properties mentioned in Sec.…”