laser diodes
Pulse formation and dynamics in self pulsating semiconductor laser diodes
... mono-section laser diodes becomes pinned at the threshold current ...layer). Laser diodes tend to emit predominantly in the in the TE mode, since it has a slightly larger T and a slightly ...
156
Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self heating
... high-brightness laser diode technology has progressed rapidly in response to competitive and evolving markets and diode lasers have found new applications in, for example, medicine and materials processing ...
10
Characterization, Simulation and Optimization of Surface Etched Slotted Tunable Laser Diodes
... slotted laser diodes have been ...a laser which achieves said requirements at the lowest possible injection ...of laser arrays has been designed to improve upon the previously reported 700 µm ...
227
Investigation into the Anomalous Temperature Characteristics of InGaN Double Quantum Well Blue Laser Diodes Using Numerical Simulation
... blue laser diodes (LDs) have attracted great attention for use in laser-based white lighting [1–3] and visible light communication appli- cations ...light-emitting diodes (LEDs) at high ...
7
Investigation of near infrared laser diodes for application in space based spectroscopic gas sensing
... prominent laser diode sources presently available on the market for gas sensing applications is ...common laser diodes and the design feature unique to all is also ...with laser diode-based, ...
160
Issues relating to the application of monolithic tuneable laser diodes to multi species gas detection
... diode laser absorption spectroscopy (T D L A S) already has a fairly long history (more than 30 years) [1], H ow ever until recently w id ely tuneable laser diodes were considered unsuitable for ...
160
High-Speed Indoor Visible Light Communication System Employing Laser Diodes and Angle Diversity Receivers
... visible laser diodes (LDs) can be used as a main source of illumination instead of LEDs due to their high efficiency, especially in high power applications ...using laser lighting is that lasers can ...
7
Development of a Novel Approach for Accurate Measurement of Noise in Laser Diodes used as Transmitters for Broadband Communication Networks: Relative Intensity Noise
... Today’s laser diodes now have RIN specifications beyond the scope of this system, some typically achieving (or claiming) -170dB/Hz at 1mW optical ...
6
Circuit-Level Modeling of Laser Diodes
... of laser diodes) into their corresponding equivalent circuit ...based laser diode model for example, it has several drawbacks and it does not lend itself well for fast prototyping of new devices or ...
85
Ultrafast harmonic mode-locking of monolithic compound-cavity laser diodes incorporating photonic-bandgap reflectors
... In these ultrafast devices, the peak pulse power is too small to affect the autocorrelation contrast ratio, and the conclusion as to whether the laser is operating ML or not, can only be drawn by juxtaposing the ...
12
Separate phase locking and coherent combining of two laser diodes in a Michelson cavity
... We have also characterized tapered laser devices specifically developed by the Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik. Details of the device design and assembly are given in [7]. ...
10
A novel method of preparation attenuated Klebsiella pneumoniae vaccine isolated from respiratory tract infections by using low power laser diodes
... 3.4 Determination of some immune parameters Interferon-γ (Type II) is synthesized mostly by Th1 lymphocytes and by NK cells after an antigenic stimulation [21]. Interestingly, natural killer cells can furthermore ...
6
Steady State Behavior of Semiconductor Laser Diodes Subject to Arbitrary Levels of External Optical Feedback
... A laser with delayed feedback builds an ideal system for analyzing and ex- ploring typical phenomena encountered in a nonlinear time-delayed system, such as bifurcations, thresholds of instability (or stability) ...
7
Strong Doping of the n-Optical Confinement Layer for Increasing Output Power of High- Power Pulsed Laser Diodes in the Eye Safe Wavelength Range
... However obtaining high output power within this spectral range is a more complex task than for shorter wavelengths of ~ 1 m (see, for a recent example, experimental dependences 2 on Figures 2 and 4 in[1]), owing mainly ...
10
Two dimensional Model of Self Pulsation in AlGaAs Laser Diodes
... The use of a fully two-dimensional waveguide analysis of the optical modes in a self-pulsating laser is described. We show that there is a need for such an analysis as the effective index model often used for ...
8
An experimental investigation of tunable laser diodes based on multiple etched slots
... Figure 1.1 a shows an idealised tunable laser diode where the optical power is dependent only on the laser current and the wavelength is dependent only on the tuning current, b shows the[r] ...
221
Frequency converted dilute nitride laser diodes for mobile display applications
... The GaInNAs/GaAs semiconductor heterostructure was grown on an n-GaAs (100) substrate by Veeco (Plainview, NY, USA) GEN20 molecular beam epitaxy (MBE) re- actor with a radio frequency plasma source for nitrogen, a valved ...
5
Point Defect Identification and Management for Sub-300 nm Light Emitting Diodes and Laser Diodes Grown on Bulk AlN Substrates
... Heteroepitaxial growth of AlGaN on these high-quality homoepitaxial layers has led to the development of AlN-based light emitting diodes and optically pumped lasers with very low lasing thresholds. 7, 8, 25 The ...
307
Negative activation energy and dielectric signatures of excitons and excitonic Mott transitions in quantum confined laser structures
... Mostly, optical spectroscopies are used to investigate the physics of excitons, whereas their electrical evidences are hardly explored. Here, we examined a forward bias activated differential capacitance response of ...
11
Temperature Effect towards DFB Laser Wavelength on Microwave Generation Based on Two Optical Wave Mixing
... Semiconductor laser can be implemented in various fields, such as for telecommunication, radar, spectroscopy and ...application, laser can be applied to generate microwave with heterodyne technique by ...
7