We demonstrate a master oscillator power amplifier (MOPA) system that emits single-frequency high-energy optical pulses at 1540 nm using an Er,Yb:glass planar waveguide and large mode area Er-doped fiber amplifier. A double under-cladding 50-µm-thick core structure are employed for the to increase output energy without degrading beam quality. pulse of 45.2 mJ with peak 27 kW is generated repetition rate 150 Hz duration 1.7 µs. Moreover, quality factor M2 1.84 highest thanks its structure.

Injection-seeded terahertz (THz)-wave parametric generation (is-TPG) using a nonlinear optical crystal of MgO-doped lithium niobate (MgO:LiNbO3) has made it possible to obtain THz waves with high peak powers and narrow linewidths. To achieve stable THz-wave from the MgO:LiNbO3 under strong excitation, photorefractive effect in would be crucial, which could eliminated by longer pump wavelength than conventional 1-μm spectral band. Here, we propose use 1.5-μm near-infrared (NIR),...

This paper presents a polarization-insensitive semiconductor optical amplifier Mach-Zehnder Interferometer (SOA-MZI) wavelength converter with wide dynamic range. Direct detection of the wavelength-converted output signal power and feedback control input to SOA-MZI are proposed confirmed be able reduce variation polarization. The gain-controlled SOA (GC-SOA) monitor PD used implement monolithically integrated into converter. A range over 8 dB is obtained for TE TM polarized signals NRZ...

The authors demonstrated observation of emission frequency chirping millimeter-wave from a time-varying plasma produced by nanosecond UV laser pulse. By using heterodyne interferometer the time-resolved dc to ac radiation converter source was observed range 20to32GHz due rapid creation. This chirped pulse is suitable for application in various novel dense diagnostics.

A compact integrated LAN-WDM EML TOSA employing stripline with an aperture in the FPC was demonstrated for 200 and 400 Gb/s Ethernet over a 10 km range. The back to TDECQs obtained were less than 1.37 dB at 2.82 Gb/s, respectively. In addition good TDECQ characteristics, penalties due electrical crosstalk well suppressed thanks signal line structure FPC. There almost no those 0.4 all lanes, which agreed very our simulation. Investigating transmission of fiber reveals that dispersion occurred...

We have developed a 1.55-μm 40 Gbps electro-absorption modulator laser (EML)-based transmitter optical subassembly (TOSA) using novel flexible printed circuit (FPC). The return loss at the junctions of board and FPC, FPC ceramic feedthrough connection was held better than 20 dB up to GHz by newly three-layer FPC. TOSA fabricated demonstrated mask margin >16% path penalty <;0.63 for 43 signal after 2.4-km SMF transmission over entire case temperature range from -5° 80 °C, demonstrating...

We improve the output of a MOPA system that emits single-frequency high-energy optical pulses using large mode area Er-doped fiber amplifier pumped by cascaded Raman laser with low 150 Hz repetition frequency.It is found unwanted light generated in at same time as pump saps gain and degrades its characteristics.By combining removal pulse technique, energy improved from less than 1.0 mJ to 1.2 SNR 30 dB compared 19 before improvement.The percentage power signal also improves 61.0% over 90.7%.

We developed symmetric 10G-EPON ONU transceiver fully compliant with IEEE802.3av PR30. Output power of +5dBm, sensitivity −32.4dBm, and fast LD turn-on/off time 10ns/7ns were successfully achieved by newly-developed burst-mode pre-bias timing control IC.

The optical triplexer module, which consists of a 10.3-Gb/s transmitter [electroabsorption modulator integrated laser diode (EA-LD)], 1.25-Gb/s (distributed feedback (DFB)-LD), and 10.3-Gb/s/1.25-Gb/s dual-rate receiver [avalanche photodiode (APD)], has been developed for 10-Gb Ethernet passive network (10G-EPON) line terminal (OLT) transceiver. We have adopted newly three lens system to accomplish high coupling efficiencies two LDs as -2.84 -1.65 dB. Moreover, we preamp IC responsivity APD...

A 43 Gbps electro-absorption modulator laser was packaged in a miniaturized module with novel impedance matched flexible printed circuit connection aiming for CFP2 transceiver showing ITU-T G.693 compliance.

We demonstrated an integrated LAN-WDM 400-Gb/s (53Gbaud-PAM4) EML TOSA. Low power consumption less than 1.3 W between -5 °C and 80 was obtained besides the measured TDECQs below 2.45 dB for all lanes.

Abstract We demonstrate a master oscillator power amplifier system that emits single-frequency, high-energy optical pulses at 1539 nm using an Er, Yb:glass planar waveguide with normalized frequency of the 4.4. A maximum pulse energy 9.7 mJ is observed repetition 500 Hz. The signal to noise ratio 25 dB and independent from 100 beam quality factor M 2 output 1.03 thanks small waveguide.

We have developed a 2-J at 1064 nm and 200-mJ 266 laser system using Distributed-Faced-Cooling chips. This paper shows characteristics when the repetition rate was increased from 1 Hz to 20 Hz.

To improve the performance of Si photonics-based wavelength locker, a new configuration for compact locker with two grating couplers (GC) and Mach-Zehnder interferometer (MZI) filter used in light source modules was proposed. Simulation results showed that proposed GC structure provides 1.4 times higher peak coupling power over 10 μm mounting tolerance monitored values MZI system enhanced three times. This shows there is feasibility on developing this topology short reach coherent communication.

We report a 2-CH EML array and its assembling technique for the next-generation IM-DD system. In this paper, we fabricate an arrayed consisting of BH DFB-LDs high-mesa EA modulators in single chip. obtained 3-dB bandwidth above 67 GHz (bandwidth is higher but could not be measured due to equipment limit), low inter-channel crosstalk below -20 dB, excellent eye quality at 112 GBaud PAM4/PAM6/PAM8.

A φ5.6-mm TO-CAN packaged light source module integrated with a Si photonics-based wavelength locker chip has been fabricated frequency shift of less than ±1.1 GHz, small enough to achieve locking operation compact package for short-reach coherent communication.

A 25Gb/s guardring-free planar AlInAs avalanche photodiode (APD) and 100-Gb/s APD receiver optical sub-assembly (ROSA) employing a quasi-collimated beam for reducing the loss demultiplexer (DEMUX) size are demonstrated 40-km link. The so fabricated achieves very low dark current of 63 nA at multiplication factor 10, with high gain-bandwidth product 225 GHz due to optimum layer absorption layer. Additionally, assembled ROSA exhibits sensitivity more than -23 dBm modulation amplitude (OMA)...

We propose and validate a compact Si photonics-based wavelength locker. Our locker does not require separate thermo-electric cooler (TEC) to keep its temperature constant due our proposed monitoring method. Thanks that, this design exhibits 70% footprint reduction compared conventional To simulate concept, we fabricated laser assembly chip mounted on individual TECs controlled their temperatures simultaneously. The measured results show broadening of the free spectral range while maintaining...

We propose a functional wavelength multicasting scheme accompanied with all-optical NRZ-OOK / RZ-BPSK modulation format conversion, using cross-phase in SOA-MZI. experimentally demonstrate error free 4-channel for 10.7 Gbps input.