摘要:
A single frequency laser system is configured with an elongated housing extending along a longitudinal axis and having opposite axially spaced upstream and downstream ends. The housing encloses a laser chip configured to emit a radiation which propagates along a light path and emitted through the downstream faucet thereof. One or more spaced frequency discriminators are mounted in the housing downstream from the chip so as to define an external resonant cavity with the upstream faucet of the of the laser chip. At least two or more separate thermoelectric coolers ("TEC") are mounted in the housing to affect the chip and discriminators so as to the output of the system at the desired frequency.
摘要:
A PA section (3) of a fiber laser device includes: an amplifying fiber (4); an LD (5) for exciting the amplifying fiber (4); an LD heat sink (6a) that absorbs heat generated by the LD (5); and an LD fan (7a), a thermistor (8), and a CPU (9) that control a heat resistance R th of the LD heat sink (6a). A temperature of the LD (5) is controlled to approach T peak by changing the heat resistance R th of the LD heat sink (6a), where T peak is a temperature at which a lasing wavelength of the LD (5) equals a wavelength at which an absorptance by the amplifying fiber (4) peaks.
摘要:
A laser system which features a distributed Bragg reflector (DBR) or a distributed feedback (DFB) tunable laser (11) coupled to a quasi-phasematched (QPM) waveguide (31; 16) of nonlinear material (13). The DBR laser is tuned either thermally (14; 51, 53) or via current injection (Itune), or both, converting the output of a red laser into blue. Thermal tuning provides coarse adjustment while injection current tuning provides fine adjustment. Intensity modulation or pulsed output may be provided by application of a modulation signal (Imod) to the DBR laser. Another embodiment provides frequency modulation (Vfsk) of the laser. In yet another embodiment, a high power laser (103) pumped fiber amplifier (101) is disposed between the laser (11) and the waveguide (16).
摘要:
A single frequency laser system is configured with an elongated housing extending along a longitudinal axis and having opposite axially spaced upstream and downstream ends. The housing encloses a laser chip configured to emit a radiation which propagates along a light path and emitted through the downstream faucet thereof. One or more spaced frequency discriminators are mounted in the housing downstream from the chip so as to define an external resonant cavity with the upstream faucet of the of the laser chip. At least two or more separate thermoelectric coolers ("TEC") are mounted in the housing to affect the chip and discriminators so as to the output of the system at the desired frequency.
摘要:
Provided is a laser system that includes a laser head (130) having a laser holder (110) configured to house a laser beam (120) and a lens (125) for reflecting the laser beam (120) at a predetermined wavelength, and a thermal-mechanical adjustment device (140) disposed on the laser head (130) and configured to adjust a temperature and an alignment of the laser beam (120), to maintain the predetermined wavelength of the laser beam (120).
摘要:
Disclosed herein are architectures for an external cavity laser. In some embodiments, the external cavity laser includes vertical cavity surface emitting laser (VCSEL) elements, a Brewster plate, frequency doubling chips, and a microlens array. The Brewster plate is arranged at an angle relative to the light path, and is configured to polarize at least the light received from the VCSELs and propagating on the light path in a first direction, and extract, from the external cavity, frequency-doubled light propagating on the light path in a second direction opposite to the first direction. The doubling chips are operable to receive the light and double the frequency of a portion of the received light. The microlens array is aligned with the VCSEL elements. A mount may be employed to mount the side stack of doubling chips by either side mounting or end mounting.