公开(公告)号：US3577097A

公开(公告)日：1971-05-04

申请号：US3577097D

申请日：1967-11-28

Applicant: TRW INC

Inventor： HILBERG RONALD P

IPC: G02F1/03 ,  H01S3/11 ,  H01S3/115 ,  H03K17/52 ,  H01S3/00

CPC classification number: H03K17/52 ,  G02F1/03 ,  G02F1/0327 ,  H01S3/1127 ,  H01S3/115

Abstract: A laser employing a single modulator in the form of a Pockels cell in the laser cavity and a polarizer. The polarizer in the cavity passes radiation having one polarization direction coming from one direction and diverts radiation having another polarization direction into an absorber. The polarizer passes radiation having one polarization direction coming from an opposite direction and diverts radiation having the other polarization direction into an output path. The modulator in the cavity rotates the polarization direction of radiation to establish the other polarization direction when energized and permits passage of radiation when it is deenergized. A high voltage electrical waveform generator circuit is provided which generates a voltage waveform having a positive DC voltage leading edge and a negative DC voltage trailing edge to the modulator. A gas trigger tube is provided in the circuit which generates a positive DC voltage leading edge in its plate circuit when it is independently triggered by a trigger signal. Another gas trigger tube generates a positive voltage when it is triggered by another trigger signal from a photodiode positioned to intercept radiation leaking from laser cavity. A coupling circuit which couples the plate circuits of the trigger tubes includes a capacitor which converts the positive voltage generated by the other trigger tube into the negative DC voltage trailing edge of the voltage waveform. The coupling circuit may also include a differentiator which allows the voltage levels on the trigger tube plates to be independently varied without affecting each other.

Abstract translation: 提供了一种高电压电波形发生器电路，其产生具有正直流电压的电压波形。 电压前沿和负直流 电压下降到调制器。 在电路中提供一个气体触发管，产生正的直流。 当其由触发信号独立地触发时，其板电路中的电压前沿。 当另一个触发信号触发时，另一个气体触发管产生正电压。 耦合触发管的板电路的耦合电路包括将另一触发管产生的正电压转换成负直流的电容器。 电压跟随电压波形的边缘。 耦合电路还可以包括允许触发管板上的电压电平独立地变化而不相互影响的微分器。

公开(公告)号：US3564454A

公开(公告)日：1971-02-16

申请号：US3564454D

申请日：1967-11-28

Applicant: TRW INC

Inventor： HOOK WILLIAM R ,  DISHINGTON ROLAND H ,  HILBERG RONALD P

IPC: H01S3/115 ,  H01S3/16

CPC classification number: H01S3/115

Abstract: LASER APPARATUS IN WHICH A PLURALITY OF MIRRORS ARE POSITIONED TO DEFINE A RESONANT LASER CAVITY, THE LASER CAVITY HAVING FIRST SECOND, AND THIRD RADIANT ENERGY PATHS ARRANGED TO INTERSECT AT A COMMON POINT TO FORM A GENERALLY Y-SHAPED CONFIGURATION, THE MIRRORS EACH BEING POSITIONED AT THE END OF ONE OF THE PATHS. A SOURCE OF LASER RADIATION IS POSITIONED IN THE CAVITY TO RADIATE LSER ENERGY ALONG THE FIRST PATH. A ROCHON PRISM IS PROVIDED WITHIN THE CAVITY AT THE COMMON POINT FOR DIRECTING RADIATION OF ONE POLARITY RADIATING ALONG THE FIRST PATH FROM THE SOURCE OF RADIATION INTO THE SECOND PATH AND RADIATION OF ANOTHER POLARITY INTO THE THIRD PATH, THE PRISM BEING CAPABLE OF DIRECTING THE RADIANT ENERGY OF ONE POLARITY RETURNING ALONG THE SECOND PATH INTO THE FIRST PATH AND THE RADIANT ENERGY OF THE OTHER POLARITY RETURNING ALONG THE THIRD PATH INTO THE FIRST PATH. A SECOND ROCHON PRISM IS POSITIONED IN THE SECOND PATH, THE SECOND PATH ROCHON PRISM BEING CAPABLE OF PASSING RADIANT ENERGY OF ONE POLARITY RETURNING ALONG THE SECOND PATH AND DIRECTING RADIANT ENERGY OF ANOTHER POLARITY INTO A PATH LEADING OUT OF THE CAVITY. A THIRD ROCHON PRIMS IS POSITIONED IN THE THIRD PATH, THE THIRD PATH PRISM BEING CAPABLE OF PASSING RADIANT ENERGY OF THE OTHER POLARITY RETURNING ALONG THE THIRD PATH AND DIRECTING RADIANT ENERGY INTO ANOTHER PATH LEADING OUT OF THE CAVITY. A FIRST POCKELS CELL IS POSITIONED IN THE SECOND PATH FOR CHANGING THE POLARITY OF RADIATION RETURNING ALONG THE SECOND PATH TO DIRECT THE RADIATION INTO THE ONE PATH LEADING OUT OF THE CAVITY. A SECOND POCKELS CELL IS POSITIONED IN THE THIRD PATH FOR CHANGING THE POLARITY OF RADIATION RETURNING ALONG THE THIRD PATH TO DIRECT THE RADIATION INTO THE OTHER PATH LEADING OUT OF THE CAVITY. IN ONE VARIATION OF THE LASER THE FIRST AND SECOND ROCHON PRISMS ARE ELIMINATED AND THE REMAINING ROCHON PRISM POSITIONED IN THE CAVITY AT THE COMMON POINT SERVES TO DIRECT RADIATION OF ONE POLARITY RADIATING ALONG THE FIRST PATH INTO THE SECOND PATH AND RADIATION OF ANOTHER POLARITY INTO THE THIRD PATH, THE PRISM BEING CAPABLE OF DIRECTING RADIANT ENERGY OF ONE POLARITY RETURNING LONG THE SECOND PATH INTO THE FIRST PATH AND RADIANT ENERGY OF ANOTHER POLARITY INTO ONE OF THE PATHS LEADING OUT OF THE CAVITY, THE PRISM BEING CAPABLE OF DIRECTING RADIANT ENERGY OF ANOTHER POLARITY RETURNING ALONG THE THIRD INTO THE FIRST PATH AND RADIANT ENERGY OF ANOTHER POLARITY INTO ANOTHER PATH LEADING OUT OF THE CAVITY. IN STILL ANOTHER VARIATION, THE SECOND AND THIRD ROCHON PRISMS ALONG WITH THE POCKELS CELL OF THE THIRD PATH ARE ELIMINATED AND A QUARTER-WAVE IS PROVIDED IN THE FIRST PATH. IN THIS VARIATION A SINGLE OUTPUT IS OBTAINED ALONG ONE OF THE PATHS LEADING OUT OF THE CAVITY.

公开(公告)号：US3694769A

公开(公告)日：1972-09-26

申请号：US3694769D

申请日：1971-05-17

Applicant: TRW INC

Inventor： HOOK WILLIAM R ,  HILBERG RONALD P ,  DISHINGTON ROLAND H

IPC: H01S3/115 ,  H01S3/11

CPC classification number: H01S3/115

Abstract: A high-power Q-switched laser is provided having a low loss. One common type of Q-switched laser conventionally includes an electro-optical element for altering the polarization of the light wave in the cavity of the laser. Preferably, the element is a Pockels cell. A voltage applied to the cell is changed suddenly to increase the Q of the cavity thereby to permit the laser to lase. It has been found that the crystal of the Pockels cell suffers a birefringent effect due to the mechanical strain caused by the applied voltage. This is counteracted by a compensating voltage applied to the cell so that the loss of the laser defined as the ratio of light power deflected out of the cavity to the light power approaching the light polarizer in the cavity becomes substantially zero at a time when the laser lases. The voltage which must be applied to a Pockels cell containing lithium niobate is positive while a negative voltage is required for a crystal of potassium dideuterium phosphate.

Abstract translation: 提供了具有低损耗的高功率Q开关激光器。 常规类型的Q开关激光器通常包括用于改变激光器腔中的光波的偏振的电光元件。 优选地，元件是普克尔斯（Pockels）电池。 施加到电池的电压突然改变以增加空腔的Q，从而允许激光器发光。 已经发现，由于施加的电压引起的机械应变，普克尔斯晶胞的晶体遭受双折射效应。 这被施加到电池的补偿电压抵消，使得被限定为在空腔中偏转的光功率与在腔中的光偏振器接近的光功率的比率的激光的损失在激光器的时间变得基本为零 灯笼 必须施加到含有铌酸锂的普克尔电池的电压是正的，而磷酸二氢钾的晶体需要负电压。

公开(公告)号：US3673504A

公开(公告)日：1972-06-27

申请号：US3673504D

申请日：1969-12-23

Applicant: TRW INC

Inventor： HILBERG RONALD P

IPC: G02F1/03 ,  H01S3/11 ,  H01S3/115 ,  H03K17/52 ,  H01J17/02

CPC classification number: H03K17/52 ,  G02F1/03 ,  G02F1/0327 ,  H01S3/1127 ,  H01S3/115

Abstract: A high voltage electrical waveform generator circuit is provided which generates a voltage waveform having a positive d.c. voltage leading edge and a negative d.c. voltage trailing edge to the modulator. A gas trigger tube is provided in the circuit which generates a positive d.c. voltage leading edge in its plate circuit when it is independently triggered by a trigger signal. Another gas trigger tube generates a positive voltage when it is triggered by another trigger signal. A coupling circuit which couples the plate circuits of the trigger tubes includes capacitor which converts the positive voltage generated by the other trigger tube into the negative d.c. voltage trailing therefor edge of the voltage waveform. The coupling circuit may also include differentiator which allows the voltage levels on the trigger tube plates to be independently varied without affecting each other.