Investigation on inter-modulation products (IMPs) for IM-DD SCM optical links

Simulative Extraction and Performance investigation of Improved Compensated DFB Laser for an IM-DD SCM Optical Link

“…A DFB laser diode (designated as Laser-1) has been chosen as the reference laser diode, whose performance has already been investigated in [11,12,13]. The parameter values of DFB Laser-1 are as illustrated in Table 1 (a)-(c).…”

“…This paper is organized as follows: In section 2 a theoretical description of DFB laser rate equation model [5,10] provides an understanding of influence of these parameters on non-linear behaviour. This will help to identify the most appropriate target parameter values besides preferring low active layer volume, high carrier lifetime, and low laser threshold current and high bias current to allow suppression of the laser impairments [11][12][13] in an IM-DD SCM lightwave system. Section 3 of this paper describes simulative procedure involved in extraction of DFB laser followed by identifying a set of appropriate and physically reasonable DFB rate equation parameter values.…”

Conservation of AM index of a rf subcarrier in IM–DD optical link

“…The most common form of optical modulation is the intensity modulation and the simplest form of its detection is direct detection in a photodiode. It is often called as IM-DD [1][2][3][4][5][6][7] communication. Significant amount of research work [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] has been carried out on direct modulation.…”

Measurement of Second Harmonic Distortion of the Detected Signal in an IM-DD Fiber Optic Link when the input IM is second harmonic contaminated

“…The modulation format used here is the intensity modulation (IM) and the detection scheme employed is the direct detection (DD) in a photodiode. In any communication system, message signal distortion at the output is an important parameter for assessing the reliability of the communication link.Survey of relevant literature indicates that message signal distortion related studies have been done by some authors [1][2][3][4][5]. Investigation of harmonic distortion, intermodulation distortion , signal clipping and effect of RIN on subcarrier multiplexed IM-DD optical link has been carried out by some authors [1][2][3].…”

“…Investigation of harmonic distortion, intermodulation distortion , signal clipping and effect of RIN on subcarrier multiplexed IM-DD optical link has been carried out by some authors [1][2][3]. Harmonic distortion and intermodulation distortion in direct modulation arises from the nonlinearity of light power vs. Laser diode (LD) bias current characteristics (L-I curve).…”