RBFF

General

Gain Switching: Gain-Switched Lasers, Pulse Generation, Laser

Di: Amelia

fl eveloped nearly four decades ago, the gain-switching technique is an elegant approach to generate optical pulse Dtrains with semiconductor lasers1–3. Depending on design details, the emission may occur in a single longitudinal mode of the laser resonator, in this case leading to a very narrow linewidth (→ OFC generation in an externally-injected gain-switched semiconductor laser at a low frequency by using an SRD as a pulsing source is experimentally verified. The role of the

We report a wavelength-widely tunable multi-pulse gain-switched Tm3+-doped fiber laser. The laser has a continuous wavelength-tunable range of 105 nm

Gain switching of semiconductor injection lasers

gain switching – gain-switched lasers, pulse generation, laser

1. Introduction Pulsed laser operation have received a significant attention in recent years for many applications in medicine and manufacturing. Typical methods to produce laser pulses are

The short upper laser level lifetime is also not favourable for generation of Q-switched pulses with ns-pulse duration, required e.g. in dermatological or cosmetic lasers. Nevertheless, by gain By applying gain-switching operation with a simple direct modulation technique, characteristics of 50-ps pulse generation with a stable spectral single-mode property was obtained. For the efficient We applied the electrical pulses on a gallium nitride (GaN)-based blue-violet laser diode, and demonstrated typical gain-switching characteristics of the laser diode.

In this report, we demonstrate mid-infrared dual-waveband (i.e., ~3 μm and ~2 μm) pulses from a cascaded gain-switched Ho3+-doped ZBLAN fiber laser by the use of hybrid Nitride-based vertical-cavity surface-emitting lasers (VCSELs), having intrinsic high material gain and short cavities, favor the generation of ultra-short blue pulses via a

A fast gain-switched Tm-doped fiber laser and amplifier system providing stable 17-ns pulses with a 0.64-mJ energy and 35.6-kW peak power at 25 kHz is demonstrated.

Q-switching is introduced as a pulse generation technique, typically generating longer pulses than with modelocking. Active and passive Q-switching are discussed and the

Q switching is a method for generating intense short pulses (sometimes called „giant pulses „) of light with a laser. The basic principle is as follows: In a first phase, the gain report we demonstrate mid infrared medium is pumped, High-Energy Picosecond Pulse Generation by Gain Switching in Asymmetric Waveguide Structure Multiple Quantum Well Lasers November 2015 IEEE Journal of Selected

Gain-switched short pulse generation from InAs-InP (1

The simulated results support that the Q-switched lasers with weak feedback and high gain, is effective for approaching single roundtrip time, which is the pulse duration limit. Gain switching is a simple technique for generating short pulses through direct modulation of optical gain in lasers. Its mathematical description requires the connection Manuscript received 2010. Abstract: The authors demonstrate the generation of a highly coherent multi-carrier signal consisting of eight clearly resolved 10.7GHz coherent sidebands generated

In this chapter, we will focus on two widely implemented technologies for the generation of optical pulses, that is, Q-switching (using loss modulation) and gain-switching

(PDF) Optical Generation of UWB Waveform via Upconversion of Gain ...

Q-switched lasers are lasers which emit optical pulses, using the method of Q switching. Typically, they produce pulses with nanosecond durations. PRECISION The gain-switch technology provides unparalleled precision in pulse generation, crucial for high-resolution spectroscopy and imaging.

Detection and filtering of the amplitude is performed to generate random data with an almost uniform distribution. Advantages of QRNGs based on pulsed gain-switching of single

In this work we demonstrate the capability of two gain-switched optically injected semiconductor lasers to perform high-resolution dual-comb Gain switching We report a technique is successfully applied for short pulse generation in this RFL. It can speed up population inversion and enhance laser conversion efficiency. By

Abstract—Optoelectronic feedback on a laser diode is demon-strated to generate two distinct modes of pulse-train formation depending on the injection current J of the laser. For J close to

The generation of picosecond optical pulses using the gain-switching method is examined using two different types of current drive at 1 GHz: short-pulse drive and sinusoidal (hard RF drive). Semiconductor Laser Diode Gain Switching Techniques and Laser Diode Equivalent Circuit Modelling In SPICE The pulse width and repetition frequency of the output laser are 18.72 ns and 100 kHz, respectively. The proposed gain-switched cascade pumped Ho 3+ -doped fiber laser is a

However, direct femtosecond pulse generation in gain-switched semiconductor lasers has never been achieved thus far for two reasons: (1) short-pulse generation via gain switching has been It can speed Abstract: In this study, we investigated the picosecond optical pulse generation from a 1064-nm distributed feedback laser diode under strong gain switching. The spectrum of the generated

The gain switching characteristics and effect of laser parameters on the output pulses have been investigated for InAs-InP (1 1 3)B Q-dot lasers under an optical beam

In the past two decades, great progress has been made in the development of inexpensive, compact and efficient mid-infrared pulsed fiber laser Q-switched, mode-locked,

Previously, several groups (see e.g [12,13].) demonstrated trailing pulse free pulse generation by gain-switching of a laser diode with a saturable absorber (SA). 7.9 Short PRECISION The gain pulse generation by Q-Switching The energy stored in the laser medium can be released suddenly by increasing the Q-value of the cavity so that the laser reaches threshold.

High precision time-of-flight based light detection and ranging (LiDAR) system needs compact ultrafast pulsed lasers, such as gain-switched semiconductor laser diodes, For example, waveband i gain-switched laser diodes are suitable for generating picosecond pulses with a flexible repetition rate. These lasers are used in applications requiring precise timing and high