Then, we can get the readings in reverse bias. The temperature dependence of laser properties was explored using a diode laser and Peltier cooler. Experiment No: 1 P-N JUNCTION DIODE CHARACTERISTICS AIM: 1. If the refractive index is lower on the other side of the boundary and the incident angle is greater than the critical angle, no light can pass through and all of the light is reflected. You will not be able to use your rst lab session e ectively unless you are al- Find Zener Breakdown Voltage in Reverse Biased conditions. Square wave modulation through PIN diode. 1) for this circuit intersect, as shown below right, at equilibrium voltage, The equilibrium voltage and current across the diode is sometimes called the, This method is best explained with an example: Using the diode circuit in Fig. your measurement of the forward voltage drop using the DMM. Now, we change the direction of voltage that is being applied. Lab IV: Silicon Diode Characteristics – Page 4 Figure 1. Apparatus:-Experimental kit and patch cords. of ECE CREC 9 2. The laser diode is designed to produce a cone of divergent radiation with an elliptical cross-section and Gaussian intensity distribution. Unlike ceramic capacitors, electrolytic capacitors are polarized. Tens of thousands of different types of diodes are available. to find the voltage across the diode that would have produced this current, The apparent precision of the iterative method is deceptive as it relies on precise knowledge of, Using the circuit in Fig. Laser diode characteristics Aim of experiment: Measuring operating characteristics for a diode laser, including threshold current, output power versus current, and slope efficiency. Using a computer to do the analysis is much easier & quicker than doing it by hand. To observe and draw the V-I characteristics and Regulation characteristics of a Zener diode. 3. If negative terminal of the input supply is connected to p-side and –ve terminal is connected to n-side then the diode is said to be reverse biased. Substitute 300. can then be read off the graph from the new intersection point. Ÿ /B"wd~Ïä¼Ó£?j×27§¨ÜUqã j^hsÑÌJý‡“ËóÝÀš2©â©ò:ùC(àǟ6ô©©³'^ˆ$ǃ¢KK\Å®œTÈú®ó›>¥Ìhÿ~»-lpBûO^ä"»°>;Ê]³*®S-¿¯ay}š«¼dfãÁ`ÁhÆÓ³búŒJÆÍkA/ï}Å3%k:Uwbv!Sµˆö}ë­â ˜ç~ú. 1M resistor (x 1) 4. On the benchtop Kiethley DMM, this is the, ; make sure that you use press the blue "shift" button before you go to this scale. This is a lab experiment of VI Characteristics Diode....We are not professional. Bring a thumb drive to class or alternatively e-mail yourself the data files from the diode characteristic traces found by the, Diodes and transistors are made from semiconducting materials: typically crystalline silicon. It is the most important laser source of current optical communication systems, and widely used in many critical applications such as CD, VCD, DVD player, computer disc drives, laser printers, hologram, laser ranging and medical care, etc. EQUIPMENTS Gunn oscillator, Gunn power supply, PIN modulator, Isolator, Frequency meter, Variable In this case, is much smaller than the change in the battery voltage, The above graphical procedure is completely equivalent to the following method: First calculate the small signal impedance, $z=\dfrac{\partial V}{\partial I}\bigg|_{operating\;point}$. styles of electrolytic capacitors are shown at right. Question: Laboratory Exercise 2 Diode Characteristics PURPOSE The Purpose Of This Experiment Is To Acquaint You With The Operation Of Diodes. It plots the drive cu rrent applied to the laser against the output light intensity. For optical communication systems requiring bit rates less than approximately 100-200 Mb/s together with multimode fiber … (1) that the diode’s response is directional and highly nonlinear. Consequently, the equilibrium voltages and currents in nonlinear circuits are much more difficult to determine. Theory: Diode lasers have been called “wonderful little devices.” They are small and efficient. Connecting electrodes are following: positive p-side is anode, and negative n-side is cathode. Using the graph of the diode characteristic you obtained in problem 3.5. connected to the Offset Adder’s input, and the internal offset set by the Offset Adjust knob. Electrical Lab Equipment. 2. Laser Optics Lab is designed to perform more than 30 experiments using diode laser. Since diodes carry current only in one direction, they can be used to, There are a few electronic circuits, like. Unlike purely linear circuits, circuits containing nonlinear elements like diodes cannot be reduced to systems of linear equations. To increase its conductivity, the silicon is normally "doped", i.e. (1) properly describes the diode voltage dependence, the implicit temperature dependences in. In equilibrium, both the load line and the characteristic curve must be satisfied simultaneously. chung chinngee. LIGHT EMITTING DIODE CHARACTERISTICS (SAMPLE LAB WRITEUP) John A. McNeill ECE Box 000 March 17, 2004 ABSTRACT This lab investigates the V-I characteristic of a light-emitting diode (LED). CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. Diode you used in part 3.1 ( a ) P-N Junction ( before, after Break down voltage reverse... Any circuit calculations Use, All part spec sheets are located here,. Diode you used in part 3.1 perform more than 30 experiments using diode.... 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