There is an increasing need for true random bits, for which true random number generators (TRNG) are absolutely necessary, because the output of pseudo random number generators is deterministically calculated from the previous states. We introduce our quantum number generator (QRNG) based on amplified spontaneous emission (ASE), a truly random quantum physical process. The experimental setup utilizes the randomness of the process. In this system, optical amplifiers (based on ASE) play the major role. The suitable sampling rate is selected in order to build the fastest generator, while avoiding the correlation between consecutive bits. Furthermore, the applied post-processing increases the quality of the random bits. As a results of this, our system generated random bits which successfully passed the NIST tests. Our real-time generation system-which is currently a trial version implemented with cheap equipment-will be available for public use, generating real time random bits using a web page. Index Terms-quantum random number generator, amplified spontaneous emission, sampling rate, real-time generation I. INTRODUCTION Nowadays, there is an ever increasing demand for random numbers in communication and cryptography. The applications of random numbers include symmetric key cryptography, Monte Carlo simulations, protection of transactions, and key distribution systems, which will be more significant in the age of quantum computers. In order to generate true random bits (TRB), quantum random number generators (QRNGs) need to be implemented. Pseudorandom number generators (PRNGs) are widespread; they are cost-efficient because they algorithmically create seemingly random numbers, but they are deterministic, therefore these numbers cannot be declared as truly random. There are some random number generators, which sample complex physical processes, but with suitable measurements others can obtain the same numbers. Nevertheless, the randomness of quantum mechanics can provide high bit generation rates. Some quantum process based generators, for instance the radioactivity based QRNG, come with several serious problems: for example, the radiation is only enough just for a few detections per second, decreasing the generation rate. Moreover, we need huge quantities of radioactive materials, for which serious security arrangements need to be implemented. There are different possible processes for random number generation (e.g. the noise of chaotic circuits or the Brownmotion of particles), but it is not possible to generate high bit generation rates using these phenomena. We can differentiate between optical based QRNG systems, too. The first group is that of is the branching path generators, when the photon goes to a semi-transparent mirror that transmits it along one of the paths. At the end of both paths there is one detector, and the number of the detector signalling the arrival of a photon determines the value of the bit. The semi-Ádám Marosits, Ágoston Schranz, Eszter Udvary are with the