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Full-Text Articles in Physical Sciences and Mathematics
Increased Power And Detuning Of Diode Lasers For Magneto-Optical Trap Of Lithium, Jami Johnson
Increased Power And Detuning Of Diode Lasers For Magneto-Optical Trap Of Lithium, Jami Johnson
Honors Student Works
Precision experiments such as laser cooling and trapping using diode laser systems are increasingly prevalent in the fields of modern atomic, molecular and optical physics. Multiple laser diodes of precise frequencies and significant output power are often needed for such research. Here, a method for injection locking a slave laser to a master laser stabilized to an atomic line of lithium is described.The slave laser is a free running diode that is injection-locked by a small portion (2 mW) of the frequency shifted master laser light. Evidence of incomplete injection locking is described, in addition to a technique for improving …
Phase Sensitive Detection: Frequency Locking Of A Laser Diode For Lithium Cooling And Trapping, Brandon Peplinski
Phase Sensitive Detection: Frequency Locking Of A Laser Diode For Lithium Cooling And Trapping, Brandon Peplinski
Honors Student Works
The frequency of a laser-diode can be locked by providing a negative feedback voltage to the piezo-electric transducer in the laser cavity. By phase-modulating the light and placing side bands on the carrier frequency, the fluorescence of the atoms is modulated. The signal from this fluorescence is phase-sensitively compared with a phase-locked reference signal in a lock-in amplifier, and an asymmetric error signal is produced. With this feedback method a laser-diode is locked within a 75 Mhz doppler-broadened spectroscopic line width. The lock is robust enough to last a few hours at a time and is impervious to high amplitude, …
Game Theory And Von Neumann’S Minimax Theorem, Megan Hall
Game Theory And Von Neumann’S Minimax Theorem, Megan Hall
Honors Student Works
We encounter many situations of conflict on a day‐to‐day basis. When trying to find a solution, we consider all the possible consequences of our choices. Sometimes, the outcome of a situation depends on the decisions of others. This is where the discussion of game theory begins. Game theory seeks to construct a mathematical model for these decision making processes. The players in a game want to find the best outcome for themselves; is it possible to guarantee that a particular outcome, no matter what the other player does? Perhaps the most important result of game theory is the Minimax Theorem, …
Sequencing Of Amine Nucleoside Polymers: Understanding The Fidelity Of Dna-Directed Reductive Amination, Sarah M. Anderson
Sequencing Of Amine Nucleoside Polymers: Understanding The Fidelity Of Dna-Directed Reductive Amination, Sarah M. Anderson
Honors Student Works
DNA replication is a form of template-directed polymerization that occurs with the aid of numerous enzymes. By developing a DNA replication mimic that can undergo template-directed polymerization without enzymes, the scope of template-directed polymerization will be broadened beyond biological systems. One template-directed polymerization method that has proven successful is reductive amination on a DNA template, a two-step polymerization reaction involving equilibrium imine formation followed by reduction of the imine to the amine. Because DNA-directed reductive amination is an information transfer system, it should proceed with fidelity; however, the extent of fidelity must be explored. These studies will require the ability …