Abstract: A method and system for treating glaucoma can include positioning an intraocular shunt in eye tissue such that the shunt conducts fluid from the anterior chamber to a target outflow region in the eye, such as the suprachoroidal space and/or the subconjunctival space (or outside the conjunctiva).

Abstract: A medical puncturing device and a system comprising medical apparatuses configured to be assembled into the medical puncturing device. The device or system comprises: a syringe barrel (1) comprising a distal closed end and a proximal open end; an elastic movement unit comprising an actuation member (2) and a floating scal (3) inside the syringe barrel (1), where the actuation member (2) and a floating seal (3) are capable of forming an elastic connection such that the actuation member (2) and floating seal (3) are capable of moving forward and backward relative to one another; a hollow puncture needle (6) fixedly connected to the actuation member (2) and proximal to the floating seal (3), where the hollow puncture needle (6) comprises a needle distal opening (6a) and a needle body opening (6b): and a flowable composition lumen (7) enclosed by the syringe barrel distal closed end, an inner wall of the syringe barrel, and the floating seal (3).

Abstract: The present invention discloses a disposable negative-pressure anterior chamber Paracentesis syringe which belongs to the technical field of medical supplies. It comprises nine parts, including a needle cap, a Paracentesis syringe, a needle base, an internal needle, a protective cover of the internal needle, an airlock, a needle tube, a collection tube and a collection tube rack. The invention has the advantages that it fixes the Paracentesis syringe during puncture and limits the depth of the needle insertion, releases the aqueous humor slowly to prevent a sudden drop of the intraocular pressure, reduces the risk of the intraocular infection by separating the anterior chamber from outside and the collection tube can collect and store the aqueous humor directly.

Abstract: The present invention discloses a disposable negative-pressure anterior chamber Paracentesis syringe which belongs to the technical field of medical supplies. It comprises nine parts, including a needle cap, a Paracentesis syringe, a needle base, an internal needle, a protective cover of the internal needle, an airlock, a needle tube, a collection tube and a collection tube rack. The invention has the advantages that it fixes the Paracentesis syringe during puncture and limits the depth of the needle insertion, releases the aqueous humor slowly to prevent a sudden drop of the intraocular pressure, reduces the risk of the intraocular infection by separating the anterior chamber from outside and the collection tube can collect and store the aqueous humor directly.

Abstract: The present invention discloses a disposable negative-pressure anterior chamber Paracentesis syringe which belongs to the technical field of medical supplies. It comprises nine parts, including a needle cap, a Paracentesis syringe, a needle base, an internal needle, a protective cover of the internal needle, an airlock, a needle tube, a collection tube and a collection tube rack. The invention has the advantages that it fixes the Paracentesis syringe during puncture and limits the depth of the needle insertion, releases the aqueous humor slowly to prevent a sudden drop of the intraocular pressure, reduces the risk of the intraocular infection by separating the anterior chamber from outside and the collection tube can collect and store the aqueous humor directly.

Abstract: The present invention discloses a disposable negative-pressure anterior chamber Paracentesis syringe which belongs to the technical field of medical supplies. It comprises nine parts, including a needle cap, a Paracentesis syringe, a needle base, an internal needle, a protective cover of the internal needle, an airlock, a needle tube, a collection tube and a collection tube rack. The invention has the advantages that it fixes the Paracentesis syringe during puncture and limits the depth of the needle insertion, releases the aqueous humor slowly to prevent a sudden drop of the intraocular pressure, reduces the risk of the intraocular infection by separating the anterior chamber from outside and the collection tube can collect and store the aqueous humor directly.

Abstract: The present invention discloses a disposable negative-pressure anterior chamber Paracentesis syringe which belongs to the technical field of medical supplies. It comprises nine parts, including a needle cap, a Paracentesis syringe, a needle base, an internal needle, a protective cover of the internal needle, an airlock, a needle tube, a collection tube and a collection tube rack. The invention has the advantages that it fixes the Paracentesis syringe during puncture and limits the depth of the needle insertion, releases the aqueous humor slowly to prevent a sudden drop of the intraocular pressure, reduces the risk of the intraocular infection by separating the anterior chamber from outside and the collection tube can collect and store the aqueous humor directly.

Abstract: A method for recovering an OTUk frame includes: receiving an optical signal sent by using a method of multi-lane distribution from the OTUk frame to an interface of an optical module; converting the optical signal into an electrical signal, performing electrical equalization and demodulation on the electrical signal, and recovering multi-lane data from the demodulated signal; aligning and rearranging the data on each lane, according to a lane sequence identifier included in an overhead frame header of the data on each lane; and recovering the OTUk frame according to the aligned and rearranged data. According to the present invention, lane rearrangement is performed by detecting the lane sequence identifier, and the recovery of the OTUk frame is achieved. Therefore, a training sequence overhead does not need to be additionally introduced, and the influence on the system performance is avoided.

Abstract: The invention relates to a clock recovery apparatus being configured to recover clock information from an input signal. The clock recovery apparatus comprises Fourier transforming means (201) being configured to transform the input signal into a frequency domain signal upon the basis of a Fourier transform, correlating means (215) being configured to correlate the frequency domain signal to obtain a correlation value associated with a certain frequency, and clock recovery means (217) being configured to determine whether the certain frequency corresponds to a clock frequency in order to recover the clock information.

Abstract: A method, an apparatus, and a system for feedback control of a coherent receiver are provided. The method for feedback control of the coherent receiver includes: obtaining a feedback control quantity according to a digital signal converted by an Analog-to-Digital Converter (ADC); and adjusting a signal amplitude output by a Transimpedance Amplifier (TIA) and a direct current component of an offset T device according to the feedback control quantity, until an analog signal input into the ADC is in a sampling range of the ADC, where the TIA is serially connected to the offset T device and then is connected to the ADC. Present invention has the following advantages: enabling the analog signal to adapt to the ADC sampling best, maximizing an effective information quantity sampled by the ADC and better supporting subsequent processing of a Digital Signal Processing (DSP) unit, thereby improving a coherent receiving performance.

Abstract: A method for channel protection switching of an optical network device, an Optical Transport Network (OTN) device, and a Passive Optical Network (PON) device is provided. The method includes detecting, by the PON device, whether an OTN alarm indication signal is received after discovering a fault. If the OTN alarm indication signal is received, the alarm generated by the PON device is suppressed so that the PON device does not perform channel protection switching. The PON device detects whether an OTN alarm indication signal is received, and suppresses the alarm generated by the PON device so that the PON does not generate futile alarms or lead to futile switching when the OTN fails but the PON works normally.

Abstract: The invention relates to a clock recovery apparatus being configured to recover clock information from an input signal. The clock recovery apparatus comprises Fourier transforming means (201) being configured to transform the input signal into a frequency domain signal upon the basis of a Fourier transform, correlating means (215) being configured to correlate the frequency domain signal to obtain a correlation value associated with a certain frequency, and clock recovery means (217) being configured to determine whether the certain frequency corresponds to a clock frequency in order to recover the clock information.

Abstract: A method for recovering an OTUk frame includes: receiving an optical signal sent by using a method of multi-lane distribution from the OTUk frame to an interface of an optical module; converting the optical signal into an electrical signal, performing electrical equalization and demodulation on the electrical signal, and recovering multi-lane data from the demodulated signal; aligning and rearranging the data on each lane, according to a lane sequence identifier included in an overhead frame header of the data on each lane; and recovering the OTUk frame according to the aligned and rearranged data. According to the present invention, lane rearrangement is performed by detecting the lane sequence identifier, and the recovery of the OTUk frame is achieved. Therefore, a training sequence overhead does not need to be additionally introduced, and the influence on the system performance is avoided.

Abstract: A method, an apparatus, and a system for feedback control of a coherent receiver are provided. The method for feedback control of the coherent receiver includes: obtaining a feedback control quantity according to a digital signal converted by an Analog-to-Digital Converter (ADC); and adjusting a signal amplitude output by a Transimpedance Amplifier (TIA) and a direct current component of an offset T device according to the feedback control quantity, until an analog signal input into the ADC is in a sampling range of the ADC, where the TIA is serially connected to the offset T device and then is connected to the ADC. Present invention has the following advantages: enabling the analog signal to adapt to the ADC sampling best, maximizing an effective information quantity sampled by the ADC and better supporting subsequent processing of a Digital Signal Processing (DSP) unit, thereby improving a coherent receiving performance.

Abstract: In the field of communication and transmission, a method and a device for receiving an OPFDM-DQPSK signal are provided. The device includes a power splitter, adapted to split the OPFDM-DQPSK signal into two beams of signals; a polarization beam splitter (PBS), adapted to splitting one of the two beams of signals into a first signal and a second signal; a demultiplexer (Demux), adapted to demultiplex the other beam of signal to obtain a third signal and a fourth signal; two delayers, adapted to delay the third signal and the fourth signal respectively; a first frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the first signal and the delayed third signal; a second frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the second signal and the delayed fourth signal; and a decision recovery module, adapted to recover four logical sequences by performing decision on the four electrical signals.

Abstract: A ranging method and system for passive optical network, and an optical network unit are provided. The ranging method includes: sending an initial ranging signal to a splitter loop-back device and recording a current sending time as a first time; receiving a loop-back ranging signal from the splitter loop-back device, and determining whether the loop-back ranging signal is a return signal of the initial ranging signal; if the loop-back ranging signal is a return signal of the initial ranging signal, recording a current receiving time as a second time; and obtaining ranging information by calculating a difference between the first time and the second time, and performing a ranging on the basis of the ranging information.

Abstract: In the field of communication and transmission, a method and a device for receiving an OPFDM-DQPSK signal are provided. The device includes a power splitter, adapted to split the OPFDM-DQPSK signal into two beams of signals; a polarization beam splitter (PBS), adapted to splitting one of the two beams of signals into a first signal and a second signal; a demultiplexer (Demux), adapted to demultiplex the other beam of signal to obtain a third signal and a fourth signal; two delayers, adapted to delay the third signal and the fourth signal respectively; a first frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the first signal and the delayed third signal; a second frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the second signal and the delayed fourth signal; and a decision recovery module, adapted to recover four logical sequences by performing decision on the four electrical signals.

Abstract: A method, device, and system for polarization division multiplexing (PDM) and polarization division demultiplexing are provided in the field of communication and transmission. The device for polarization division demultiplexing includes a polarization controller (PC), a polarization beam splitter (PBS), a detection control module, an optoelectronic receiver 1, and an optoelectronic receiver 2. The PC is adapted to receive a PDM optical signal carrying an identification signal and perform polarization control on the PDM optical signal. The PBS is adapted to perform polarization division on the PDM optical signal carrying the identification signal after the polarization control. The detection control module is adapted to perform identification signal detection on the optical signal after the polarization division to obtain a power of the identification signal, and output a polarization control signal to control the PC according to a power change of the identification signal.

Abstract: A method for channel protection switching of an optical network device, an Optical Transport Network (OTN) device, and a Passive Optical Network (PON) device is provided. The method includes detecting, by the PON device, whether an OTN alarm indication signal is received after discovering a fault. If the OTN alarm indication signal is received, the alarm generated by the PON device is screened so that the PON device does not perform channel protection switching. The PON device detects whether an OTN alarm indication signal is received, and screens off the alarm generated by the PON device so that the PON does not generate futile alarms or lead to futile switching when the OTN fails but the PON works normally.

Abstract: A ranging method and system for passive optical network, and an optical network unit are provided. The ranging method includes: sending an initial ranging signal to a splitter loop-back device and recording a current sending time as a first time; receiving a loop-back ranging signal from the splitter loop-back device, and determining whether the loop-back ranging signal is a return signal of the initial ranging signal; if the loop-back ranging signal is a return signal of the initial ranging signal, recording a current receiving time as a second time; and obtaining ranging information by calculating a difference between the first time and the second time, and performing a ranging on the basis of the ranging information.