A multiwavelength source having precise channel spacing for WDM systems

Veselka, J. J.; Korotky, S.K.

doi:10.1109/68.681283

Cited by 83 publications

(25 citation statements)

References 6 publications

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“…In addition, the use of multi-wavelength sources will also reduce the overall cost of the DWDM system. There are many methods available to generate a multi-wavelength source; one method is the use of a supercontinuum multi-wavelength source that is generated by injecting a high repetition rate mode-locked optical pulse into a nonlinear fiber [2,3]. This, however, requires a complicated configuration with expensive modelocking device, which is not cost effective.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Bismuth-Based Brillouin/Erbium Fiber Laser with Linear Cavity Configuration

Ahmad

Shahabuddin

Dimyati

et al. 2007

Fiber and Integrated Optics

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A multi-wavelength Brillouin/erbium-doped fiber laser (BEFL) which operates in 1594 nm region is demonstrated using a 215 cm long Bismuth-based EDF and SMF. Two optical circulators were used at the output ends of the system to form a linear cavity to produce a cascaded Brillouin Stokes and anti-Stokes. A stable output laser comb of more than 20 lines was obtained with a spacing of approximately 0.089 nm at a Brillouin pump power of 4 dBm and two 1,480-nm pumps at powers of 100 mW. The number of lines is relatively higher compared with the ring cavity BEFL.

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Section: Introductionmentioning

confidence: 99%

An Enhanced Bismuth-Based Brillouin/Erbium Fiber Laser with Linear Cavity Configuration

Ahmad

Shahabuddin

Dimyati

et al. 2007

Fiber and Integrated Optics

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“…The lasing wavelengths are chosen by incorporating different optical filters within the cavity, such as Fiber Bragg Gratings (FBG) [4,5], Mach-Zehnder filters [6][7][8][9] or external Fabry-Perot lasers [10] among others.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Tuning Capability of Erbium-doped Multiwavelength Ring Lasers having Different Host Fiber Material

Barroso¹,

Díaz²,

Abad³

et al. 2007

Journal of Optical Communications

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An experimental study of the tuning range of two dualwavelength all fiber ring lasers is presented. A comparison based on the active medium used inside the ring cavity is performed: Erbium doped silica fiber versus Erbium doped fluoride fiber. Two different filters have been incorporated within the cavity in order to achieve dualwavelength emission of the source: a fixed wavelength Fiber Bragg Grating and a tunable Fabry-Perót for testing the tuning capability of the laser.

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“…The second technique is a combination of a periodically driven MachZehnder modulator (MZM) and a nonlinear fiber. Here, CW light is periodically amplitude modulated and then coupled to a nonlinear fiber, in which the light undergoes additional modulation by the process of self-phase modulation [14] . The third method features concatenated Mach-Zehnder (MZ) intensity modulator (IM) and phase modulators (PMs) comprising a simple configuration based on a hybrid sinusoidal amplitude-phase modulation using tandem LiNbO 3 modulators [15−17] .…”

mentioning

confidence: 99%

Generation of coherent optical multi-carriers using concatenated, dual-drive Mach-Zehnder and phase modulators

Zou¹,

Wang²,

Shao³

et al. 2012

中国光学快报

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The generation of coherent optical subcarriers based on a concatenated dual-drive Mach-Zehnder intensity modulator (IM) and two phase modulators (PMs) is proposed and experimentally demonstrated. The modulation index and DC bias of PM+IM modulation are theoretically investigated. Theoretical analysis and numerical study are also carried out to examine the proposed scheme. We use 25-GHz RF synchronous sinusoidal signals to drive cascaded two-stage PMs and IM, through which we generate 28 subcarriers with peak power fluctuations less than 4 dB. The measured tone-to-noise ratio of the subcarrier is higher than 40 dB. The experimental results show that for 100-Gb/s polarization multiplexing QPSK signal, the receiver sensitivity of the back-to-back signal is −28.6 dBm, and the power penalty is lower than 1 dB after 100-km transmission at the BER of 1×10 The bandwidth demands for communication and computer applications have grown in recent years, such as in the areas of Internet video applications, downloads, and so on; thus, it has become necessary for optical communication to migrate from 10 to 100 Gb/s or even higher (e.g., 1 Tb/s) [1−8] . Given that wavelength-divisionmultiplexing (WDM) [5,6] and coherent optical frequencydivision multiplexing (OFDM) [7−9] are promising techniques for such high-speed long-haul transmissions, many researchers have attempted to come up with better techniques to achieve high-speed transmission. Recently, a 16×112 Gb/s NRZ-DQPSK modulation format for dense WDM (DWDM) transmission [6] and a 1.2-Tb/s orthogonal DWDM transmission [10] have been reported. To increase the capacity of WDM transmission, many approaches have been proposed, such as expanding the usable wavelength band, increasing the bit rate, narrowing the channel spacing [11] , using new optical fibers, and compensating for nonlinearities. With these approaches, a multi-carrier transmission system with narrower channel spacing (i.e., increased spectral efficiency) is suitable for long haul transmission, because it can decrease the bit rate of every single channel with large number of multi-wavelengths. However, the key research issue for multi-wavelength transmission, i.e., the source should be stable, compact, and cost-effective, must be addressed.There are several techniques to generate multi-carriers. First of these is the supercontinum (SC) generation, which is the combination of an optical pulse generator and nonlinear fiber. In this method, the optical pulse spectrum is broadened based on optical pulse compression through a nonlinear fiber [12,13] . The second technique is a combination of a periodically driven MachZehnder modulator (MZM) and a nonlinear fiber. Here, CW light is periodically amplitude modulated and then coupled to a nonlinear fiber, in which the light undergoes additional modulation by the process of self-phase modulation [14] . The third method features concatenated Mach-Zehnder (MZ) intensity modulator (IM) and phase modulators (PMs) comprising a simple configuration based on a hybrid sinusoidal am...

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A multiwavelength source having precise channel spacing for WDM systems

Cited by 83 publications

References 6 publications

An Enhanced Bismuth-Based Brillouin/Erbium Fiber Laser with Linear Cavity Configuration

An Enhanced Bismuth-Based Brillouin/Erbium Fiber Laser with Linear Cavity Configuration

Comparison of the Tuning Capability of Erbium-doped Multiwavelength Ring Lasers having Different Host Fiber Material

Generation of coherent optical multi-carriers using concatenated, dual-drive Mach-Zehnder and phase modulators

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