Optoelectronic Integrated Circuit Design and Device Modeling by Jianjun Gao
By Jianjun Gao
In Optoelectronic built-in Circuit layout and machine Modeling, Professor Jianjun Gao introduces the basics and modeling thoughts of optoelectronic units utilized in high-speed optical transmission platforms. Gao covers digital circuit parts corresponding to FET, HBT, MOSFET, in addition to layout innovations for complicated optical transmitter and receiver front-end circuits. The booklet comprises an summary of optical communique platforms and computer-aided optoelectronic IC layout sooner than going over the fundamental idea of laser diodes. this can be through modeling and parameter extraction strategies of lasers and photodiodes. Gao covers high-speed digital semiconductor units, optical transmitter layout, and optical receiver layout within the ultimate 3 chapters.
- Addresses a niche in the swiftly turning out to be quarter of transmitter and receiver modeling in OEICs
- Explains diode physics prior to machine modeling, aiding readers comprehend their an identical circuit types
- Provides complete factors for E/O and O/E conversions performed with laser and photodiodes
- Covers an in depth variety of units for high-speed functions
- Accessible for college students new to microwaves
- Presentation slides to be had for teacher use
This booklet is essentially aimed toward practising engineers, researchers, and post-graduates within the parts of RF, microwaves, IC layout, photonics and lasers, and strong kingdom units. The ebook can also be a robust complement for senior undergraduates taking classes in RF and microwaves.
Lecture fabrics for teachers to be had at www.wiley.com/go/gao
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Extra info for Optoelectronic Integrated Circuit Design and Device Modeling
Sample text
Commonly used pair of materials is gallium arsenide (GaAs) with aluminum gallium arsenide (AlGaAs). Each of the junctions between different bandgap materials is called a heterostructure, and hence the name ‘double heterostructure laser’ or DH laser. Double heterojunctions are used to confine both the charge carriers and the optical fields in the vertical direction. The losses due to absorption outside the active region are greatly reduced because the laser beam is confined to the active region and the bandgap of the n and p layers is wider so that the light of the lasing-supported wavelength cannot be absorbed.
Therefore a large number of photons can be obtained, which, in turn, will stimulate other excited electrons to emit light. If the injected electron and hole population is large enough, stimulated emission can exceed the absorption and other losses in the material, so that optical gain can be achieved in the active region. The optical gain alone is not enough for laser operation. The other necessary ingredient is optical feedback – it converts an amplifier into an oscillator. In most lasers the feedback is provided by placing the gain medium inside a Fabry–Perot (FP) cavity formed by using two mirrors.
The dynamic characteristics of semiconductor lasers include amplitude modulation (that is small signal intensity modulation), frequency Basic Concept of Semiconductor Laser Diodes 35 modulation (laser chirping), large signal switching transients, and relative intensity noise. These dynamic properties of the active region can be studied by using the rate equations. The rate equations may be solved by numerical integration to obtain a timedomain solution or used to derive a set of steady-state or small-signal equations to help in further understanding the static and dynamic characteristics of semiconductor lasers.