Ultrawide and tunable self-oscillating optical frequency comb generator based on an optoelectronic oscillator

Broadband optical frequency comb generation based on single electro-absorption modulation driven by radio frequency coupled signals

“…High-quality OFC with a large number of comb lines, high flatness of comb line power, and tunable frequency spacing is the current research focus. OFC can be generated based on mode-locked laser [6,7], nonlinear fiber [8], micro-ring resonator [9], photoelectric oscillator [10,11], and external modulator [12][13][14][15][16][17][18][19]. Among these methods, using external modulator has the advantages of stable output spectrum, adjustable frequency spacing between comb lines, simple structure, and flexible operation.…”

“…The multi-frequency signal generated by the multiplication coupler was called RF coupled signal, and was used to drive the EAM to increase the number of comb-lines. In contrast to lithium-niobate (LiNbO 3 ) MZM, EAM has the advantages of low cost and integrability [11]. In previous studies, nonzero-chirp EAM was adopted [16,17].…”

Flexible‐rate optoelectronic wireless transmission system at 101 GHz using multiband CAP‐PAM modulation and envelope detection

“…With the rapid exhaustion of accessible transmission bands, the terahertz (0.1–10 THz) band with wider bandwidth and higher frequency has been attracting plentiful interests 1,2 . Photonics‐aided wireless schemes based on intensity‐modulation and direct‐detection (IM/DD) have been broadly investigated, 3–6 which combine the flexibility of wireless communication, the broadband of optical fiber communication and lower complexity compared with coherent detection. Moreover, recent artificial intelligence‐based optimization approaches, such as particle swarm optimization and ant colony 7 have been wildly utilized for designing electromagnetic and THz devices, including envelope detectors (ED), 8 phase correction, 9 and spatial filters, 10 which further promote the existing schemes.…”

Performance evaluation of optical carrier suppressed RZ‐DPSK signal in WDM networks employing OFC

“…[1][2][3] It has been generated by various techniques including the single and cascaded configuration of intensity modulators, radio frequency shifting loops, and self-oscillating loops. [4][5][6] The generation of OFC by the utilization of intensity modulators has shown growing interest because of its advantageous features in providing more power per carrier and high repetition rates. 7 Due to the ability of the optical single-sideband (OSSB), optical double sideband (ODSB), and carrier suppressed (CS)modulation techniques to overcome fiber nonlinearities; varieties of methods have been proposed to generate and demonstrate the efficacy of the scheme.…”

“…Optical frequency comb (OFC) and its deployment in the wavelength division multiplexing (WDM), orthogonal frequency division multiplexing (OFDM), and generalized FDM has been widely discussed in 1–3 . It has been generated by various techniques including the single and cascaded configuration of intensity modulators, radio frequency shifting loops, and self‐oscillating loops 4–6 . The generation of OFC by the utilization of intensity modulators has shown growing interest because of its advantageous features in providing more power per carrier and high repetition rates 7 .…”