An instrument that outputs the time difference between two pulse signals as a pulse amplitude (height).
Electromagnetic waves at frequencies around 1 THz (wavelength: 300 um). Terahertz waves transmit through paper, wood, and plastic but do not transmit through metal and water. The terahertz band is called the fingerprint region of substances, and their applications are recently being developed along with progress made from basic research.
In a photodiode, the PN junction can be considered as a type of capacitor. This capacitance is termed the junction capacitance and is an important parameter in determining the response speed. In current-to-voltage conversion circuits using an op amp, the junction capacitance might cause gain peaking. At HAMAMATSU, we specify the terminal capacitance including this junction capacitance plus the package stray capacitance.
A thermally sensitive resistor that greatly changes its electrical resistance as the temperature changes. Thermistors are used for temperature sensing.
When an electric current flows through the junction of two dissimilar electric conductors, heat absorption (or heat generation) occurs on one side while heat generation (or heat absorption) occurs on the other side. Thermoelectric cooling elements make use of this effect (known as Peltier effect). Reversing the direction of the electric current reverses the relation between the heat absorption and generation.
An arrangement of two or more photosensors in a tile configuration to have a wider active area. Also called “edge-to-edge butted.”
A detector mainly used in elementary particle energy physics experiments for the purpose of tracking the traveling direction and decay processes of secondary particles generated as a result of high energy particle collisions. Tracking detectors are installed at positions surrounding the point where the particles collide.
An amplifier which converts a small photocurrent to a voltage. The gain of the amplifier is usually given as the transimpedance gain in units of volts/amp.
The electron transit time is the time interval between the arrival of a delta function light pulse (pulse width less than 50 ps) at the photocathode and the instant when the anode output pulse reaches its peak amplitude.
Transit time spread is a result of different electron trajectories inside a PMT and different initial velocities of photoelectrons leaving the cathode. The effect is a fluctuation or jitter in the transit time and a broadening of the pulse. The spread is defined as the FWHM of the probability distribution of these fluctuations.
This originally meant the frequency at which the current gain (hfe) of an emitter-grounded transistor is 1, but now indicates the frequency at which the gain of an amplifying element becomes 1.
Light sources for multiple-wavelength transmission systems.
It looks like you're in the . If this is not your location, please select the correct region and country below.
You're headed to Hamamatsu Photonics website for GB (English). If you want to view an other country's site, the optimized information will be provided by selecting options below.
For modern websites to work according to visitor’s expectations, they need to collect certain basic information about visitors. To do this, a site will create small text files which are placed on visitor’s devices (computer or mobile) - these files are known as cookies when you access a website. Cookies are used in order to make websites function and work efficiently. Cookies are uniquely assigned to each visitor and can only be read by a web server in the domain that issued the cookie to the visitor. Cookies cannot be used to run programs or deliver viruses to a visitor’s device.
Cookies do various jobs which make the visitor’s experience of the internet much smoother and more interactive. For instance, cookies are used to remember the visitor’s preferences on sites they visit often, to remember language preference and to help navigate between pages more efficiently. Much, though not all, of the data collected is anonymous, though some of it is designed to detect browsing patterns and approximate geographical location to improve the visitor experience.
Certain type of cookies may require the data subject’s consent before storing them on the computer.
This website uses two types of cookies:
There are two ways to manage cookie preferences.
If you wish to restrict or block web browser cookies which are set on your device then you can do this through your browser settings; the Help function within your browser should tell you how. Alternatively, you may wish to visit www.aboutcookies.org, which contains comprehensive information on how to do this on a wide variety of desktop browsers.
Occasionally, we may use internet tags (also known as action tags, single-pixel GIFs, clear GIFs, invisible GIFs and 1-by-1 GIFs) at this site and may deploy these tags/cookies through a third-party advertising partner or a web analytical service partner which may be located and store the respective information (including your IP-address) in a foreign country. These tags/cookies are placed on both online advertisements that bring users to this site and on different pages of this site. We use this technology to measure the visitors' responses to our sites and the effectiveness of our advertising campaigns (including how many times a page is opened and which information is consulted) as well as to evaluate your use of this website. The third-party partner or the web analytical service partner may be able to collect data about visitors to our and other sites because of these internet tags/cookies, may compose reports regarding the website’s activity for us and may provide further services which are related to the use of the website and the internet. They may provide such information to other parties if there is a legal requirement that they do so, or if they hire the other parties to process information on their behalf.
If you would like more information about web tags and cookies associated with on-line advertising or to opt-out of third-party collection of this information, please visit the Network Advertising Initiative website http://www.networkadvertising.org.
We use third-party cookies (such as Google Analytics) to track visitors on our website, to get reports about how visitors use the website and to inform, optimize and serve ads based on someone's past visits to our website.
You may opt-out of Google Analytics cookies by the websites provided by Google:
We inform you that in such case you will not be able to wholly use all functions of our website.