Experimental demonstration of distributed feedback semiconductor lasers based on reconstruction-equivalent-chirp technology

Li, Jingsi; Wang, Huan; Chen, Xiangfei; Yin, Zuowei; Shi, Yuechun; Lu, Yanqing; Dai, Yitang; Zhu, Hongtu

doi:10.1364/oe.17.005240

Cited by 96 publications

(40 citation statements)

References 18 publications

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“…The optical spectrum, P-I characteristics and optical field distribution in the cavity of a DFB laser have been previously reported [10], and it has been concluded that DFB lasers based on REC technology have the same optical characteristics as conventional DFB lasers. In 2009, a monolithic 30-wavelength semiconductor laser array was reported based on REC technology [11], and this demonstration further verified the potential applications of REC technology in laser arrays [12].…”

Section: Rec Technologymentioning

confidence: 75%

Photonic integrated technology for multi-wavelength laser emission

Chen

et al. 2011

Chin. Sci. Bull.

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We summarized the design, fabrication challenges and important technologies for multi-wavelength laser transmitting photonic integration. Technologies discussed include multi-wavelength laser arrays, monolithic integration and modularizing coupling and packaging. Fabrication technique requirements have significantly declined with the rise of reconstruction-equivalent-chirp and second nanoimprint mask technologies. The monolithic integration problem between active and passive waveguides can be overcome with Butt-joint and InP array waveguide grating technologies. The dynamic characteristics of multi-factors will be simultaneously measured with multi-port analyzing modules. The performance of photonic integration chips is significantly improved with the autoecious factors compensation packaging technique. photonic integration, laser, multi-wavelength Citation:Chen X F, Liu W, An J M, et al. Photonic integrated technology for multi-wavelength laser emission.

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Section: Rec Technologymentioning

confidence: 75%

Photonic integrated technology for multi-wavelength laser emission

Chen

et al. 2011

Chin. Sci. Bull.

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“…By tuning injection current of DFB laser diode array, wavelengths of each channel of the array can be tuned [12,13]. Based on reconstruction-equivalent chirp (REC) technology and through employing phase shift, we have realized fourchannel tunable laser array with each laser channel's wavelength can be continuously tuned on a large scale [14,15]. The characteristic of the tunable DFB-LD array used in the experiment is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A novel algorithm based on DFB tunable laser array for demodulation of FBG sensors

Guo

Yao

et al. 2017

IEICE Electron. Express

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In this paper, a high effective demodulate algorithm based on tunable four-channel DFB (Distributed Feedback) laser array is proposed. In comparison with common algorithms which can work correctly when tunable laser have to be rapidly tuned through FBG's (Fiber Bragg Grating) whole spectrum, the algorithm is unique in that accurate demodulation can be done by scanning only 0.4 nm bandwidth of FBG's reflected spectrum and the scanned spectrum can be any part of the whole FBG spectrum including those regions with relatively low power. Therefore, the laser tuning time and response time of demodulation system is much more reduced which is important for most applications that need dynamic, real-time measurements. Wavelength-division multiplexing for FBG sensing network will be supported by the demodulating system and algorithm. Based on strain experiments of the FBG sensing system, excellent demodulation accuracy were demonstrated by the proposed algorithm.

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“…Reconstruction equivalent chirp (REC) technique based on sampled grating has been proposed and widely studied to reduce the fabrication cost and improve the laser performances [12][13][14][15][16][17][18][19][20]. As reported in [18], 60-channel DFB laser arrays with high wavelength accuracy and high single-longitudinalmode (SLM) operation was successfully demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…As reported in [18], 60-channel DFB laser arrays with high wavelength accuracy and high single-longitudinalmode (SLM) operation was successfully demonstrated. In a REC based DFB laser, phase shift or chirp can be equivalently realized by pre-designing sampling pattern and uniform basic (seed) grating [12]. Since the sampled grating with multi-order reflections is used as resonator, the 0th order wavelength must be designed in the non-gain region to ensure the stable SLM operation of 1st or +1st order subgrating.…”

Section: Introductionmentioning

confidence: 99%

Transient mode competition in directly modulated DFB semiconductor laser

Xiao

Shi

Zheng

et al. 2015

Sci. China Phys. Mech. Astron.

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A new effect of transient mode competition in directly modulated DFB laser based on equivalent phase-shift (EPS) technique is presented and studied. Since there are multi-order reflections in EPS structure and if the 0th order subgrating is properly designed, the transient lasing of 0th order will occur during the rising time of the injection current. As a result, transient mode competition between 1st order (main mode) and 0th order will occur accordingly. This can consume redundant carrier and suppress the transient relaxation oscillation, which may be applied in some areas like on-off switching modulation of DFB semiconductor lasers. As an example, an equivalent  phase shift (-EPS) is carefully designed to realize the effect. In such a laser the 0th order wavelength is in the margin of the material gain region and the 1st order wavelength is around the gain peak, while the stable single longitudinal mode (SLM) operation of the 1st order is guaranteed. The simulation investigation is performed. Good results with suppressed relaxation oscillation and 1.25 Gb/s directly on-off modulation (32 dB extinction ratio) are demonstrated. We believe it provides a new kind of method for on-off switching with high extinction ratio and weak relaxation oscillation. DFB semiconductor laser, mode competition, relaxation oscillation, sampled grating PACS number(s): 42.55.Px, 42.60.Mi, 42.60.Rn Citation: Xiao R L, Shi Y C, Zheng J L, et al. Transient mode competition in directly modulated DFB semiconductor laser.

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Experimental demonstration of distributed feedback semiconductor lasers based on reconstruction-equivalent-chirp technology

Cited by 96 publications

References 18 publications

Photonic integrated technology for multi-wavelength laser emission

Photonic integrated technology for multi-wavelength laser emission

A novel algorithm based on DFB tunable laser array for demodulation of FBG sensors

Transient mode competition in directly modulated DFB semiconductor laser

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