摘要:
We disclose apparatus that includes: (a) an enclosure including an aperture; (b) a prism mounted in the enclosure so that a surface of the prism is exposed through the aperture; (c) an optical assembly contained within the enclosure, the optical assembly including a radiation source and a radiation detector, the source being configured to direct radiation towards the prism and the detector being configured to detect radiation from the source reflected from the exposed surface of the prism; and (d) an electronic processor contained within the enclosure, the electronic processor being in communication with the detector. The apparatus can be configured so that, during operation, the electronic processor determines information about a sample placed in contact with the exposed surface of the prism based on radiation reflected from the exposed prism surface while it is in contact with the sample.
摘要:
Systems and methods disclosed include: a support apparatus configured to detachably receive a chip; movable pins extendible from a first position to a second position, where, in the first position, the movable pins do not contact a chip positioned on the support apparatus, and in the second position, the movable pins contact electrical terminals of a heating element within a chip positioned on the support apparatus; a radiation source configured to direct radiation to be incident on a chip positioned on the support apparatus; a detector; and an electronic processor, the electronic processor being configured to detect molecules in a sample positioned within the chip, and to determine a temperature of the chip by measuring an electrical resistance between two of the multiple pins connected to the electrical terminals.
摘要:
A laser package comprising a semiconductor laser having an operating temperature range and a heater, wherein the heater is configured to heat the laser when the laser package is positioned in an environment having an ambient temperature which lies outside of the operating temperature range of the laser, so that the laser will remain within the operating temperature range.
摘要:
We disclose an apparatus comprising: a hand-portable optical analysis unit including an optical interface; and a device configured to receive and releasably engage the hand-portable optical analysis unit. The device comprises: a housing; a sample unit in the housing; and a resilient member configured to bias the sample unit and the hand-portable analysis unit towards each other when the hand-portable optical analysis unit is received in the device to compress a sample disposed between the sample unit and the optical interface of the optical analysis unit. Methods of analyzing samples are also disclosed.
摘要:
Semiconductor substrate is disclosed having quantum wells having first bandgap, and quantum wells having second bandgap less than second bandgap. Semiconductor structure is disclosed comprising substrate having quantum wells having given bandgap, other quantum wells modified to bandgap greater than given bandgap. Semiconductor substrate is disclosed comprising wafer having quantum wells, section of first bandgap, and section of second bandgap greater than first bandgap. Method for forming semiconductor substrate is provided, comprising providing wafer having given bandgap, depositing dielectric cap on portion and rapid thermal annealing to tuned bandgap greater than given bandgap. Semiconductor structure is disclosed comprising substrate having quantum wells modified by depositing cap and rapid thermal annealing to tuned bandgap greater than given bandgap. Method for forming semiconductor substrate is disclosed, comprising providing wafer having quantum wells having given bandgap, depositing cap on portion and rapid thermal annealing to tuned bandgap greater than given bandgap.
摘要:
Disclosed herein are Raman probes that include: (a) a first optical fiber for receiving laser excitation light from a light source and transmitting the same; (b) a first filter for receiving light from the first optical fiber and adapted to pass the laser excitation light and to block spurious signals associated with the light; (c) a second filter for receiving light from the first filter and adapted to direct the light toward a specimen; and (d) focusing apparatus for receiving the light from the second filter, focusing the light on the specimen so as to generate the Raman signal, and returning the Raman signal to the second filter. The second filter is further configured so that when the second filter receives the Raman signal from the focusing apparatus, the second filter filters out unwanted laser excitation light before directing the Raman signal to a second optical fiber.
摘要:
A spectrometer comprising a collimating element for receiving input light and collimating the same, a dispersive optical element for receiving light from the collimating element and dispersing the same and a focusing element for receiving light from the dispersive optical element and focusing the same on a detector assembly wherein, where the wavelength dispersion of the dispersed light extends in the x-y direction, the collimating element and the focusing element are formed so as to maintain the desired optical parameters in the x-y plane while having a reduced size in the z direction.
摘要:
An optical isolator is disclosed for transmitting light in a first direction and blocking light in a second direction along an optical pathway. The optical isolator includes an input polarizer having a pass axis at first angle, an output polarizer having a pass axis at second angle, a Faraday rotator material between the polarizers having a Verdet constant and an axis of maximum length therethrough, generation means for generating a magnetic field around and inside the rotator material, and at least one reflector configured to define an optical length through the rotator material which is longer than the axis therethrough. The optical pathway length through the rotator material, the magnetic field strength, and the Verdet constant are selected so as to rotate light through the Faraday rotator material from the first angle to the second angle.
摘要:
An external cavity wavelength stabilized laser system including a platform, a laser mounted to the platform with a laser mount, a diffractor mounted to the platform with a diffractor mount, and a lens mounted to the platform with a lens mount between the laser and the diffractor so as to transmit light therebetween wherein the wavelength of the laser is determined by (i) the angle of incidence of the light on the diffractor and (ii) the diffraction characteristics of the diffractor and wherein the system components are selected so that (i) a change in the angle of incidence of the light on the diffractor due to a change in the temperature of the system components substantially offsets (ii) a change in the diffraction characteristics of the diffractor.
摘要:
The invention is in the field of distributed Raman amplification for digital and analog transmission applications and other applications, e.g., instrumentation and imaging applications, including HFC-CATV applications. In particular, the invention uses a high power broadband source of amplified spontaneous emission (ASE) as the Raman pump source for improved system performance. The invention also includes methods for constructing such a high-power broadband Raman pump.