single-mode DFB lasers
Single mode interband cascade lasers emitting below 2 8 μm
... wave mode at room temperature, with threshold currents of 57 mA and demonstrated side mode suppression ratios of larger than 25 ...material, single-mode DFB emission was observed within ...
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Development, characterisation and analysis of narrow linewidth, single frequency DFB fibre lasers in the 1 5 µm 2 µm region
... the DFB laser, such as the fabrication of the fibre, fibre photosensitivity and photostabilisation of gratings inscribed, is described in this ...the DFB laser, the same as that reported in [17], was made ...
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Low Power Consumption Substrate Emitting DFB Quantum Cascade Lasers
... cascade lasers (QCLs) have undergone a rapid development and become the most promising source in the mid-infrared frequency region ...power, single-mode operation and compact size, ...
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Monolithic single mode interband cascade lasers with wide wavelength tunability
... require single mode laser emission, which can be achieved by a grating structure providing distributed feedback (DFB) ...conventional DFB lasers is however limited by the ...
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Coupled-cavity terahertz quantum cascade lasers for single mode operation
... sented in Fig. 5, the maximum emitted power at a heat sink temperature of 13 K is in excess of 3.5 mW. The latter was measured with a calibrated THz power meter and was not corrected for the polyethylene window ...
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Low divergence single-mode surface-emitting concentric-circular-grating terahertz quantum cascade lasers
... CCG DFB QCLs. Robust single-mode operation is realized at all bias currents, and the side-mode suppression ratios were as high as ~30 dB, indicating efficient single-mode ...
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ULTRA-HIGH BW OPTICAL COMMUNICATION USING OXYGEN PLASMA ASSISTED InP BASED HYBRID Si LASER
... of DFB – SEL, consists of a 200 µm long gain ...of DFB and k value from the DFB ...the DFB-SEL measured on chip by collecting light out of both sides of the laser with integrated silicon ...
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Experimentally verified modeling of erbium ytterbium co doped DFB lasers
... By comparing the absorption by different length of fiber segments with each other, we obtained an average value of the absorption per unit length. Although the pump power is delivered to the fiber in single ...
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1.3-µm, 4 25-Gbit/s, EADFB laser array module with large-output-power and lowdriving-voltage. transmitter
... for single- mode-fiber (SMF) based 100GbE (100GBASE-LR4 and –ER4), and a lot of work has been done on 25G light sources in discrete form for the first generation, the so-called centum form- factor pluggable ...
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Single-mode surface-emitting concentric-circular-grating terahertz quantum cascade lasers
... demonstrated single-mode sur- face emitting THz QCLs using second-order CCGs, which can be simply fabricated by metal evaporation on top of the laser active ...azimuthal mode. We show that the CCG ...
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Nanoimprinted distributed feedback lasers of solution processed hybrid perovskites
... nanoimprinted polymer gratings to fabricate distributed feedback (DFB) lasers. The lead acetate deposition route is shown to be an effective method for fabricating low-loss waveguides (loss coefficient ~6 ...
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Continuous-wave highly-efficient low-divergence terahertz wire lasers
... cascade lasers (QCLs) have undergone rapid development since their demonstration, showing high power, broad-tunability, quantum-limited linewidth, and ultra-broadband ...the mode index to 3. Here, we ...
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High Efficiency, Low Power Consumption DFB Quantum Cascade Lasers Without Lateral Regrowth
... HR-coated DFB QCL at 150 mA with the heat sink temperatures ranging from 15 to 105 ...the single mode emission with the side-mode- suppression ratio (SMSR) above 20 dB was tuned from ...stable ...
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Multicore rare earth doped fibres; application to amplifiers, filters and lasers
... fibre lasers (BEFL) have recently been demonstrated as a novel mode of operation of fibre lasers, using both the gain of an erbium doped fibre (EDF) and Brillouin gain in single-mode ...
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Composite Cavity Fiber Laser with Asymmetric Output Intensity and Wavelength
... fiber lasers, distributed Bragg reflector (DBR) and distributed feedback (DFB) fiber lasers had received much ...Having single longitudinal mode, narrow linewidth and high coherence ...
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Dynamic modal analysis of monolithic mode-locked semiconductor lasers
... transverse-lateral mode profile, and , , , and are amplitudes, frequencies, phases, and spatial profiles of longitudinal modes, respectively (strictly speaking, can be also a function of , albeit weak, because of ...
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Characterization of single mode laser and tunable laser array based on etched high order surface gratings
... in single-m ode lasers. For single-m ode lasers, th e change in th e te m p e ra tu re w ill change th e re fra ctive index and hence s h ift th e w a ve le n g th ...r single -m o d e ...
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A new design approach for fibre DFB lasers with improved efficiency
... fiber lasers are attractive devices for a number of applications in the communica- tions [1]–[3] and sensing [4]–[6] ...of DFB fiber lasers can be configured in a parallel array to provide ...
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Single mode lasers based on slots suitable for photonic integration
... Realizing single mode lasers with very simple fabrication has attracted strong continued interest among groups all over the ...coupled DFB lasers [1–3] and surface-grating distributed ...
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Photonic crystal Bragg lasers : design, fabrication, and characterization
... The fabrication procedure consists of a series of lithography, etching, planarization, and metallization steps (see also Chapter 4). First, the photonic crystal lattice is defined using electron-beam lithography and ...
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